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Are there different brackets that hold the distributor shield on. I seem to have a fit /alignment problem of the distributor cover and vertical shield on the passenger side bracket. The bracket that I have doesn't seem to go back far enough toward the firewall to assemble correctly. The drivers side fits perfect. Does any one have picture that I compare what I have with a know correct one. I might have the incorrect bracket on that side. This would be for a 72 base 350 CI
Help would be appreciated.
John
Hi Guys
The pictures help are helping. Hi Alan In looking at your picture looks like I do have the bracket installed on the proper intake bolt ( the second one in from the back) My bracket looks like yours but where the wing nut attaches to the cover is too far forward by at least 3/4 of an inch. If I was to attach the cover where it is, the air cleaner would interfere and not set down properly. I also notice on mine that the vacuum diaphragm and vacuum line is right up against the bracket not allowing any more adjustment in the counterclockwise direction. It doesn't look like you have much room to adjust your either. Which leads me to believe that I have the incorrect bracket.
I don't where I heard this but it sticks in my mind that there are two different brackets for that side that from general appearance look the same but might have different attach point dimensions.
John
...leads me to believe that I have the incorrect bracket...
...I don't where I heard this but it sticks in my mind that there are two different brackets for that side that from general appearance look the same but might have different attach point dimensions...
Might be; distributor cans changed over the years and may have required a different bracket. Use the part number shown in the AIM.
UPDATE: Corvette Central shows the same brackets for 68-74 for small blocks. A different pair for big block cars.
Check with Willcox. I'm betting they would know if the brackets changed.
Last edited by Easy Mike; Oct 15, 2010 at 01:19 PM.
Here goes. The two are very different. The passenger side is bent much further back. Driver's side is on #1 bolt and passenger side on 2nd one in. I do not know if this is correct but it obviously works.
Hi John,
I agree that the mounting points on the bracket changed over the years as the distributor shield changed. On my 71, (not in the picture), I can fit either the 70 or 71-72 styles on the original 71 bracket.
As I remember you're getting ready to have your car judged, sorry I can't help more!
Regards,
Alan
Thank you all for the pictures and comments. I think I may have the correct brackets, but today I have ordered a new (right) one just in case and to see if there is a difference in the brackets. I also noticed that I may just need to "mechanically adjust" the other bracket back towards the firewall which in turn will move the cover on the right side to move forward and get it a lot closer to where it needs to attach.
I also noticed in the various pictures the different positions of the distributor vacuum advance module. Mine is right up against the bracket ( no room for adjustment counterclockwise) and others are away from the bracket allowing for adjustments both ways.
More to come after I get the bracket.
John
Hi John,
I took some pictures this morning of both sides. Perhaps they'll help along with the other good pictures and suggestions already posted.
Note how close the distributor can is to the bracket. The original vacuum hose has a little mark on it where it leaned against the bracket for all those years.
Good Luck!
Regards,
Alan
Thank you all for the pictures and comments. I think I may have the correct brackets, but today I have ordered a new (right) one just in case and to see if there is a difference in the brackets. I also noticed that I may just need to "mechanically adjust" the other bracket back towards the firewall which in turn will move the cover on the right side to move forward and get it a lot closer to where it needs to attach.
I also noticed in the various pictures the different positions of the distributor vacuum advance module. Mine is right up against the bracket ( no room for adjustment counterclockwise) and others are away from the bracket allowing for adjustments both ways.
More to come after I get the bracket.
John
This is the explanation for the rearward position of the vacuum advance can: essentially to straighten out the tach drive. Note that #1 wire is now to the right of the points door where in "regular" V8s (non-HEI) it was to the left.
Alan's pic shows the wires numbered. Here is mine.
Hi Paul and Alan
I just got done looking at both of your pictures and comparing them with my car and everything's identical to yours. My can and vacuum tube is right up against the bracket. Now I have a different problem that the position of your # 1 plug wire isn't the same on mine. The wire in that position on mine goes to the right bank ( probably # 2) instead. Yours goes to the left bank.
Time to get the books out.
John
Hi Paul and Alan
I just got done looking at both of your pictures and comparing them with my car and everything's identical to yours. My can and vacuum tube is right up against the bracket. Now I have a different problem that the position of your # 1 plug wire isn't the same on mine. The wire in that position on mine goes to the right bank ( probably # 2) instead. Yours goes to the left bank.
Time to get the books out.
John
I am a little confused but I think you have #1 in the traditional position shown by rvazquez. And that works fine for the vacuum can he shows. A little hard on the tach drive but certainly functional. But hence those 90* adaptors that vendors sell. Just move the wires one position anti-clockwise.
This is not a good pic but you can see the tach cable coming straight into the distributor.
Hi Paul,
The position of your can is seems to be identical to the position of my can.
Regards,
Alan
Yes, I know almost all men have their cans in the same place except perhaps those who's cans are dragging.
OK, Alan. I can get very adequate timing ranges with my configuration. It's bang on about 12* static now. The car runs well. No comment on my TCS bypass.
Hi Paul,
I was mostly trying to make a 'can' joke!
I've spent the day transferring the heel pad from my original carpet to new carpet. A REAL project to do without making any new stitch holes in the pad.
For a crazy person there are quite some differences in the pads that come on the various reproduction carpets compared to the original.
I'm a little loopy now. Cheap champagne hasn't helped either.
The weather is just fine enough to do hamburgers outside for maybe the last time.
Regards,
Alan
Hi Paul,
I was mostly trying to make a 'can' joke!
I've spent the day transferring the heel pad from my original carpet to new carpet. A REAL project to do without making any new stitch holes in the pad.
For a crazy person there are quite some differences in the pads that come on the various reproduction carpets compared to the original.
I'm a little loopy now. Cheap champagne has helped either.
The weather is just fine enough to do hamburgers outside for maybe the last time.
Regards,
Alan
I removed most of the furniture off the rear patio today into the basement and garage. Now "most" is in the basement for winter. The Wife has many plants out there yet?? That's OK, the hard frost has not set in yet.
The 1969 AIM, UPC 6, Page B6, shows a diagram of the correct position of the distributor. The vacuum nipple of the can points ~105° clockwise from straight ahead. That puts it more rearward than your photos show yours are. The AIM agrees with the diagram in post 12. Positioning the distributor correctly as the diagram shows gives the tach cable a straight shot to the drive fitting. No need for those 90° gimmicks, or kinks in the tach drive cable.
Pete
The 1969 AIM, UPC 6, Page B6, shows a diagram of the correct position of the distributor. The vacuum nipple of the can points ~105° clockwise from straight ahead. That puts it more rearward than your photos show yours are. The AIM agrees with the diagram in post 12. Positioning the distributor correctly as the diagram shows gives the tach cable a straight shot to the drive fitting. No need for those 90° gimmicks, or kinks in the tach drive cable.
Pete
The 1974 is a d***** if you do and d***** if you don't year. Up to 1973 there was an oil pressure line in that area and of course 1975 went to HEI with #1 wire in a different postion on the cap. In 1974 there is a bulbous oil pressure sensor on one side to contend with and the shield bracket on the other. The tach cable will hit the former and the vacuum can the latter if things are not quite right. This requires some playing with the distributor gear position and TDC via the rotor position to get a reasonable range of timing positions. Mine is set at 12* static in the position shown. It did take some fooling about to get there.