Ive read through numerous posts regarding balancing the one piece rear main seal engines but am still confused. My question is; which balancer/flywheel combo do I use for an internally balanced 383 one piece rear main seal engine (post 1987)?
I understand to NOT take the flywheel/balancer in to the shop and the rotating assy needs to be internally balanced. In doing so, does this require purchasing a new flywheel/harmonic balancer different from my previously used L-98 configuration? If so, which ones... pre 87?
Do I neutral balance my current flywheel or order a new one from a pre 87 350 and have it neutral balanced? Same question for the harmonic dampner (balancer). Ive read several opinions on this and the more I read the more confused I become. To top it off, I took the block to the machine shop today and they requested I bring the balancer/flywheel in so they can balance it as a complete set!

here's a link to a previous post with my 383 build. ahh, nevermind, I'll have to figure out how to do that later.

Thanks in advance for the help.

tell your shop what you're doing, just to avoid a problem or confussion. only one flywheel/flex plate will bolt to the one piece seal cranks, one made for a one piece seal crank that has the bat wing weight. that's what you'd want to use so if you ever need a replacement you can buy off the shelf and be ready to go.