flexplate ?'s
 

I have 3 flex plates here. 1 from my aod 2 from c4's. the weights on the aod and big c4 plates have the same #s, the small c4 flex plate (which i need to use w/ small bellhousing c4) has a different #. How do i know if the small flex plate has the right weight? John

weight it with a electronic scale

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89 with 395 single stage n2o .garret t3. 373's Suspention worked out finnaly . need cage .

The C-4 is a 28.8oz balance and your engine is 50oz. You will have to have the C-4 plate rebalanced or get a new one made for the swap. The numbers are diffrent because the small one has 157 teeth on the stater ring and the larger one has 164 (same as an aod).

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85 mustang coupe with a 88 block,edelbrock 6022 aluminum heads,crane roller rockers,aluminum driveshaft,C-4 trans,3500 stall,4.10gears,lakewood traction action liftbars with air bag in right rear spring,longtube headers,flowmasters,
weiand stealth intake,600 holley,
best e.t. 1/8 mile 7.94
best mph. 85.84
best 60 foot 1.72...