flywheel questions

[1970Custom]

I have two SBF flywheels, both pre '80's both same year but not identical part numbers. One was on a 351 and the other on a 302...

Where does the difference lie?

 

[kiwi f150]

I have two SBF flywheels, both pre '80's both same year but not identical part numbers. One was on a 351 and the other on a 302...

Where does the difference lie?

I remember a discussion on this a couple of years ago but not exactly the outcome so i did a quick google search and came up with this article http://www.mustangandfords.com/techarticles/28738_ford_basics/viewall.html

Possibly both of those flywheels won't work if you are running a post 1981 engine block due to balancing issues but as far as the difference goes there doesn't seem to be any - here is a listing out of Dallas for pre 80s flywheel and they list the same flywheel for 289,302 and 351w

http://www.dallasmustang.com/mustan...351W-CAST-IRON-REBUILT-PLUS-CORE-CHARGE/10751

 

[1970Custom]

Nope, both are '74, thanks Mark.

 

[primetime]

Tooth count on the ring gear. Seems to me there is 157 and 164 tooth units.