If I go for some Molnar rods (or other) I'll likely have to re balance, Yes?
Currently it's still external balance with the weight on the flex plate.
The Molnar rod is listed as 769 grams. Have a stock rod that is 742 grams. That is a 27 gram difference, maybe yours are different don't know. What I do know is big end weight difference will affect balance more then small end, but most will say rebalance at a 20 gram bobweight change (actually a lot will say so at 10 grams) and considering it will be heavier not lighter it matters more. I'd plan on a re-balance.
While we are on the suspect parts subject may want to replace that factory 428 crankshaft too. Are threads on here of them failing too for no good reason. All I will say is either go buy that stroker kit or if you think the shop knew what they were doing trust in that. Engine building is like Domino's when one falls a bunch of others do too and you can end up forever changing things. Well is all I will say on the subject. Good luck with it.
Thanks.
A little more info...
I had the block, crank, and rod work done so long ago it's hard to remember,
tho the machine shop was well known and did good work. (Pro race engines)
Prior to assembling the short block, a buddy was over visiting and the crank was standing on end in the corner.
Well... he being a klutz somehow knocked it over and it hit the concrete floor with a big KLANG!
I took it back to the shop to check for straight and make sure it was still good.
Told them what happened and they checked it and said it was ok....
I'm still considering the stroker kit.
For what I have in the bottom end right now, (not much)
It wouldn't be too much of a hardship to spring for a stroker kit.
I can probably sell the existing bottom end to offset some of it.
My main concern is the .040 overbore and how much the stroker would stress the cyl walls.
I guess I could always go for a stock stroke aftermarket crank and related parts.