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From what I know there are only two types of starters for small block chevs. They are either straight mount or staggered mount. I'm not sure at what point in time the mounting changed. I recently purchased a starter for my L82 - 1977 coupe with a standard transmission and it was a staggered mount as per the link below. I was unsure exactly which starter was required but when I spoke to customer support at Powermaster they advised that if I removed the old starter then it would be obvious if it was a straight or staggered mount. I also know that some of the starters will only work with 168 tooth flywheels/flexplates and other ones will only work with the 153 tooth flywheel/flexplates. There are some higher priced Powermaster Ultra Torque units that will work with either type flywheel/flexplates and they also have selectable straight or staggered mounting, but they are quite a bit more money. Hope this helps...
I think that your starter is actually a staggered mount. The straight mount has the bolt holes in the starter directly inline with each other. Below is some shots of my old starter that came of my 1977 L-82 manual trans. This is what a staggered mount starter should look like, have a look at the mounting holes. Hope this helps...
Originally Posted by Dream Bikes
Surely helps, thanks
My flywheel has 168 tooth.
My starter seems has straight mount, what do you think?
You should also get the correct mounting bolts with the knurl on the shank. The shank is larger than a normal 3/8 bolt and will help keep the starter in alignment and tight.
You should first determine if you really need a starter...Many times its something else and the starter is often blamed...save your self a lot of grief....I know from being in the business...many sold are not necessary..You could also get a re-manufactured OE type for a lot less at a local parts store and nicest of all, "No Corvette Tax" {obnoxious freight charges}....
327`s are straight across mounting,
350`s are staggered
Thanks for the info. However, I have a question for you. You advise that a 327 uses a straight mount and 350's use a staggered mount. I'm not sure, but I think the starter selection is more dependent on the block that is used.
The reason I say this is that the Powermaster website shows the 9502 XS Torque starter model as the recommended starter for the GMPP - ZZ4 - 350 crate engine (referring to the Powermaster starter application guide). The website link below shows a photo of the 9502 as being a straight mount starter. Maybe it's a error on their website, but it might be worth contacting Powermaster to confirm the correct starter model if a ZZ4 or another small block chevy using a 153 tooth flywheel/flexplate is the motor that is being used. Just a note...
You should first determine if you really need a starter...Many times its something else and the starter is often blamed...save your self a lot of grief....I know from being in the business...many sold are not necessary..You could also get a re-manufactured OE type for a lot less at a local parts store and nicest of all, "No Corvette Tax" {obnoxious freight charges}....
327`s are straight across mounting,
350`s are staggered
The ZZ engine is a later model 350 and that should be the staggered aluminum nose starter used with a 168 tooth flywheel...327`s are straight across bolt noses...Those cast iron nose starters are really for the 396-427 engines....You may even have a metric block that can accept the modern GM gear reduction small starter....What came off the engine or are you transplanting a later model GM crate engine...The ZZ engines are crate engines and could use the smalll model GM staggered gear reduction starter...Which by the way is a very good one. Smaller and powerfull...They also interchange with the late 454`s.....
PS I dont care for the aftermarket starters as in your link, waste of money and the drive is not supported
Last edited by Ironcross; Nov 26, 2009 at 08:35 PM.
The best bet for you is the small GM metric gear reduction used on late model 350`s and 454`s...it`s a staggered aluminum nose starter....Stay away from that aftermarket crap, especially when the GM starter is so good. and available everywhere in local parts stores..
I think you are right that both the staggered and straight mount starters should fit in your block. But to be sure you could measure the distance between the straight bolt holes and make sure the distance is the same on the starter. I'm sure one of the manufacturers must have design specifications available on the Internet. I would also say that Ironcross maybe right in his recommendation, however I'm not sure what local parts stores might stock the GM starters in Milan, Italy. As I believe that is where you are located. At any rate I have the Powermaster starter and it seems to work good for me. JMHO