i am swaping in 78 a chevy small block 400 into a 88 iroc with a world calss t5 what i need to know is what starter will work with this combo and what kind of car i would find it in it has to be a diagonal bolt patern any one know?????

 

You need to drill and tap the block for the 153-tooth starter pattern.

 

would rather not drill and tap the block any one elts know??/

 

There's no alternative. The staggered hole is directly through where the body of the starter would need to be to fit the 153 tooth flywheel, and a 168 tooth flywheel won't fit inside the T5 bellhousing.

 

hmm dont mean to hi jack a thread but im curious as i will be swapping a 75 350 into my iroc....i bolted up the starter and it fits fine but dont have the flex plate on will i have a problem?

 

Not if you use a 168 tooth flexplate. Certain headers might not clear the starter, though.

 

well im running a auto so need the 153 one and im running shorty headers. just some ones i pulled off another iroc..

 

You can put either flexplate on an automatic. It's the T5 that gives him a problem, the bellhousing is too small for the 168.

 

you will need one of these to run the 153 tooth flywheel
http://www.kmjent.com/cart/product.p...7109850&page=1

the 153 tooth is the only one that will work in the t5 bellhousing.

and ur best bet is to get a aftermarket starter the high tq ones cause ur going to need it anyway

 

To use a stock 305/350 flywheel, or you can just get a 153 tooth flywheel for the 400.

 

you have to get a aftermarket external balanced flywheel to work on the 400. that why there is that added weight to make the stock 305/350 flywheel to make it external not internal

 

Yes, exactly.