Gm goodwrench crate suffix help

[Kyle89]

3m1227 1vp that's the front of the block I wanna figure out every detail I can any help would be greatly appreciated

 

[Kyle89]

This is the block casting I cant find info on either

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[Kyle89]

I may be mistaken but will my flywheel out of my 92 which is brand new matched to the nv4500 and 92 350 but is the flywheel bolt pattern the same on the crank?

 

[evilunclegrimace]

I may be mistaken but will my flywheel out of my 92 which is brand new matched to the nv4500 and 92 350 but is the flywheel bolt pattern the same on the crank?

The bolt pattern has not changed for longer than you have been alive.

 

[Kyle89]

The bolt pattern has not changed for longer than you have been alive.

I didt think so lol

 

[Schurkey]

The "pattern" is the same, but the bolt circle diameter changed with the addition of the one-piece rear main seal in '86. The one-piece seal crankshafts use a smaller bolt circle than the two-piece seal cranks.

 

[Kyle89]

I should still be able to use my flywheel off my 92 since it dont have 500 miles on it I hope so

 

[L31MaxExpress]

I should still be able to use my flywheel off my 92 since it dont have 500 miles on it I hope so

Take a picture of the crank flange looking at it from the rear of the engine. I believe that is a 2 piece rear main seal Targetmaster aka Goodwrench 350 Hecho en Mexico special. Your flywheel will not bolt to it if so. The 1 piece rear main seals have an aluminum housing on the rear of the engine. The 2-piece do not.

 

[Kyle89]

Will my clutch kit that's also got less than 500 miles on it work ?

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[Schurkey]

Yup, that's the old bolt circle. Larger than the '86-newer.