I have a lt-1 style t-56 trans that is currently running behind a 94 350. My question is if I can use the 1pc lt-1 neutral balance flywheel combined with a 454 porkchop weight on my 1999 454?

Thanks

 

It's a different bolt pattern at the crank.

Also, the pull clutch is sensitive to too-thick clutch assemblies including things like taller flywheels or flywheels made taller with sandwiched weights. You would probably find a 0.100" thick weight to prevent proper clutch release.

Centerforce adaptive flywheel is the simplest, based on parts you probably already have.

 

What's the part number for that flywheel? I can't find it on summit or centerforce's website

 

Call them. They, or Spec make one to suit the unique 454 balance, old bolt pattern, and 153 tooth ring / starter setup.