View Full Version : 28 oz inbalance, or not??
nielsmobers
03-21-2003, 11:03 AM
I have a '72 with a 302/FMX combo (seems to be a rare combo). Does anyone know the inbalance of the flex plate?? I properbly have a flex plate of a 351 engine (because my engine vibrates), but to be sure I have to know if there is a difference in inbalance between these two. If there isn't than that can't be the problem!
Shaggy
03-21-2003, 12:22 PM
If you are sure it is a 72 then it is 28oz just like the 351. So that is not the problem. How does you harmonic balancer look?
nielsmobers
03-21-2003, 04:16 PM
I've already replaced the balancer, so that is not the problem...
But your sure that if I replace 302/FMX flex plate for a 351/FMX flex plate it's the same?
Shaggy
03-21-2003, 05:47 PM
Yes as long as you are sure you have an early model motor someone correct me if I am wrong on the year but the 302 did not become 50oz imbalance until 84(it was in the mid 80's, I think the exact year was 84). Up until them all small blocks were 28oz with the exception of a very few that were neutral balanced such as the Hi-po 289's.
mustangII460
03-22-2003, 01:07 AM
Rule of thumb. Gray block, 50oz. 1982 & up.