went to order the 347 stroker kit the other day and we have not yet pulled the motor just getting parts while we get time to get it in the shop. when calling about the kit they asked the diameter of the flywheel. our first 347 build the motor was out and my cousin did the machine work and had that diameter. question: is there a one size for all of them (stock) and if not, is there a way to find out without getting under it to measure (20* outside not so fun).

1986 5.0 H.O. auto. Notchback. any help would be great! thanks everyone!

 

Same diameter as stock

 

they said they need to know for the right sized flexplate....

 

I believe it's 10.5 diameter, normally there 28oz balance

 

Actually the clutch is 10.5 in, the flywheel is stock size 157tooth

 

ok awesome! thanks!! this build is my dads and so he asked if i knew and i was like nope but i know some ppl that will haha

 

Just weight and teeth numbers. U cant balance a stroker with a 50oz anything. Has to be 28.2 or 28oz.

 

flex plate should be 28.2 oz and 164 teeth, manuals are 157 IIRC...

 

This depends on which auto he uses. AOD's and large bell housing c4's and the c5 use 164 tooth BUT small bell c4's use 157 tooth flexplates. The c5 was used a couple times in the 80's for the v6 applications. Its the same as a c4 for the most part but has a few slight differences.