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[C1] Who among you has installed a big block Chevy engine in a 57 Corvette ?

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[C1] Who among you has installed a big block Chevy engine in a 57 Corvette ?

 
Old 10-05-2018, 06:50 PM
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Default Ok Thanks

Originally Posted by jrm5657 View Post
Yes, it was a stock 283-270HP with single holley. Not sure how much clearance there was between air cleaner lid and hood. Dan should be able to give you an idea.
Thanks does anyone know carb pad height of this manifold or have one they could measure. Thanks in advance.
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Old 10-05-2018, 10:40 PM
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Default Found it

I found it in an old post 4.18 thanks
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Old 10-06-2018, 04:29 PM
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Default One more question.......

Originally Posted by jrm5657 View Post
My Arctic Blue 57 that Dan Hampton has now, had a 283 with 66-67 350Hp intake with Holley carb and drop base air cleaner. Fit fine under stock hood. I thought Rex started this post about BBC,and now we are talking SBC?
In the interest of my calculations to compare apples to apples. When you say drop base air cleaner are you talking GM hp air cleaner base with standard 3 inch air cleaner?
Thanks again.
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Old 10-06-2018, 06:07 PM
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Originally Posted by Vette5311 View Post

In the interest of my calculations to compare apples to apples. When you say drop base air cleaner are you talking GM hp air cleaner base with standard 3 inch air cleaner?
Thanks again.
Yes, that is correct. Although I may have used a shorter filter, like a 2.5"


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Old 10-06-2018, 08:39 PM
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Default OK Guys................



Here is the scoop. I mocked up the engines today, The big block Chevy (std deck height) with the LS6 intake, according to my calculations and measurements, is 1/4 inch lower at the carb pad than the small block Chevy with the L79 intake. Given both engines mounted in the same place. Of course variations could occur from sagged body mounts, crushed engine mounts, etc. etc. Your results may be different, but I think I am fairly close here. Now if Dan is checking in on this thread, could you tell us about how much clearance there is above the air cleaner lid and hood. Assuming a GM HP drop base air cleaner and 3 inch element. This would be on the 1957 car jrm5657 referred to that I believe he said you have with the L79 intake. Thanks to Dr L88, jrm5657 and all for your help in figuring this out. It was this thread that got my interest rekindled in this "project creep" 1957 of mine. Knowing I can get the bbc in it has really got me going again. I will be posting results in a new thread, as I feel like I have hi jacked this one, and that was never my intent. Since we all like pictures, I have included a couple of the intended engine for my C1. If you look closely you can see the air cleaner base sits so low the breather tube actually hits the valve cover! Thanks again to all for your help.
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Old 10-06-2018, 09:32 PM
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That is a nice looking rat. I guess you are planning to use a front motor mount plate of some sort to keep as much exhaust clearance as possible on the sides. A BBC is an inch or 2 longer than a SBC I think, but I don't think anything would interfere up front around crossmember or steering. Probably won't be able to use a mechanical fuel pump with out notching the frame rail because SBC fuel pump is a tight fit.
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Old 10-06-2018, 10:35 PM
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Originally Posted by jrm5657 View Post
That is a nice looking rat. I guess you are planning to use a front motor mount plate of some sort to keep as much exhaust clearance as possible on the sides. A BBC is an inch or 2 longer than a SBC I think, but I don't think anything would interfere up front around crossmember or steering. Probably won't be able to use a mechanical fuel pump with out notching the frame rail because SBC fuel pump is a tight fit.
I'm hoping to use side mounts, since I went to R & P steering there is extra room where the steering box was. Just have to run u joints and shafts around the #1 tube. If I can go side mounts that will allow me more options for engines in the future if the bbc doesn't work out. Fuel pump is no problem as it's a Gen V block w/o fuel pump boss. I'll just have to mock it all up and see how it goes. If push comes to shove I can always go with front mounts. Big thing is on top, I won't cut the hood, and I think I am past that. Thanks for your help.

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Old 03-14-2019, 05:14 PM
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Originally Posted by Vette5311 View Post
I am wanting to do this and have a copied set of motor mounts that I believe came off of an early swap kit. I forget the name but have the info in my files. I can get you pics if interested. I had the headers and foolishly sold them years ago. My big question has always been "would the low rise 454 LS6 aluminum intake clear the hood or would a scoop still be needed?" Let me know what you decide. Good Luck
I have a 61 and want to put a 396 into it...had one in high school, 425hp. Used a Bill Thomas kit and it dropped right in,,,didn't have to cut the hood and the headers fit fine as long as you mounted them before installing the motor. I have contacted the guys @ Bill Thomas and they do not have any kits nor did they have any prints to manufacture the components. As I remember they were really hesitant to sell the kit but did. Car ran like a demon as long as you didn't want to stop quickly or turn a corner as speed. If anyone out there has a set up they want to sell please let me know. BK
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Old 03-16-2019, 02:33 PM
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Originally Posted by Vette5311 View Post
ok I've decided to attack this from a different angle. I need to establish a baseline to calculate from. So.........does anyone know the tallest intake that will fit under the stock hood of a 57? I called Edlebrock and they said they did not know but they do know an air gap intake is to high. Has anyone here ever tried the 327 GM high perf intake from a 365 hp or is it to tall also? OR does anyone have a stock 2x4 intake and can measure it as described in the drawing posted above?
thanks for any help.
I ran a Wieand 7530 Team G under my stock 62 hood on its 327 engine with a L88 Style GM drop base air cleaner.

Last edited by wesmigletz; 03-16-2019 at 02:34 PM.
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Old Yesterday, 12:57 PM
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Originally Posted by bkoool View Post
I have a 61 and want to put a 396 into it...had one in high school, 425hp. Used a Bill Thomas kit and it dropped right in,,,didn't have to cut the hood and the headers fit fine as long as you mounted them before installing the motor. I have contacted the guys @ Bill Thomas and they do not have any kits nor did they have any prints to manufacture the components. As I remember they were really hesitant to sell the kit but did. Car ran like a demon as long as you didn't want to stop quickly or turn a corner as speed. If anyone out there has a set up they want to sell please let me know. BK
I don't want to sell mine at the moment, but if you PM me your address I will make pattern copies and you can make some out of steel plate as I did. I copies the Bill Thomas pattern from ones a friend had, so you would be getting a copy of a copy, but should be pretty close. LOL
see pics in post #28

Last edited by Vette5311; Yesterday at 01:00 PM. Reason: more info
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