83 Mustang 351W w/C4 swapping to T-5

I have an 83 GT that I swapped in an early 80's 351W with a C4. The car used to be a 302/T5. I want to go back to my T5 and to my understanding the 351 is a 28oz imbalance vs. the 302's 50 oz. How do I get around this?

My thoughts were to buy a 79-80 Mustang flywheel that I believe is a 28oz and buy a 10 inch clutch instead of the 10.5 on later mustangs. But when it comes time to swap in a Tremec am I screwed? Dang I wish I would've stuck with the manual in the first place. Thanks.

Just get a 28oz flywheel for a smallblock. A 157 tooth part from an early 302 would work. Simple as that.