This comes to mind am i supposed to be running a flywheel instead of a flexplate with this type of set up......
2sav

Your motor plate is designed for an internally balanced flywheel, which would not have a counterweight, new flex would do the same, only fix I can think of would be to cut the motor plate out where the flywheel (flexplate) is (all the way around).
 Looks installed correctly to me.

That plate is pretty thick. IMO...

Doesn't the champfer in the inside diameter fit funny? Didn't think they would work backward, could be full of crap though

Actually...yes it does,but we cant see that....I dont recall where mine was,but yes you are right,i believe.....

2 Sav Simply scribe a line around the outer circumferance of the flex plate or just the area that will be affected by the counter weight  Then "band saw" it out to relive it you'll be fine ( you could also have someone "mill out" a "relief' in the back surface. RE flex plate we (and lots of others ) routinely use Auto flex plates and "SFI" (heavier Drag race approved) Alot depends on if/how you engine was Balanced and what crank (interenal or external balance) Call if you need help or have questions Tom

Note 396/427 BBC'sd use "zero balance flywheel or flex plate" and dampner ,454 family are external (counterwieghted)  mark 4 & 5 are different "balance" than each other,if you inaveratanly mix these any components up the thing will shake like a "dog crappin peach seeds"  SOME aft mkt cranks for late BBC's are made with nuetral balance (edit)

How about a shim?
http://www.jegs.com/p/TCI/748595/10002/-1/10537
And a new flexplate?
http://www.jegs.com/p/TCI/746478/10002/-1/10537

2sav

I would try the shim, if you have more than .030 interference the engine probably would not want to turn over.
 

I think i will buy both...... This way i have a brand new flexplate ( not warped,bent or whatever) And if i don't need the shim with the new plate, i wont use it......

2sav

I think i will buy both...... This way i have a brand new flexplate ( not warped,bent or whatever) And if i don't need the shim with the new plate, i wont use it......

2sav

Not sure if putting a different flexplate will affect the balance since the motor was balanced to the one you currently have.

Not sure if putting a different flexplate will affect the balance since the motor was balanced to the one you currently have.

No its not............I dont remember where i got this flexplate from, but this engine didnt come with one

2sav

Our Balancer (and lots of others) balance the rotating assy to use standard flywheel and dampners ,weighted or zero (does not balance the peripherals/externals) This is ,in part so that if a flywheel or balancer change is needed that component doesn't need rebalance.
2 Sav what is this motor ,is the balancer on it now the one that came with the motor and was this motor "balanced " . is the balancer counter weighted (use a small mirror) to look for a counter weight on the backside of the dampner Tom

This 454 came from a wrecked  tow truck....I know nothing about it  yes the balancer is counter weighted no its not the one that came with it, that one was f up badly. the rubber was coming out of it all the way around it. the flexplate did not come with it either, i dont remember where i got that from but its junk....looks to be warped and the counter weight is seperating from it

2sav

Glad you figured it out !

Yeah me too   Yo Propless.......Remember the 1 step forward and 2 steps back

Im feelin it 
The new one will be here today!!!! Its out for delivery, and yes............Im tracking it
2sav

Ok now get to work and get it wet.
 T.J.