[86 m.c]

I have a 4 bolt main 350 74-80. I'm confused about my connecting rods, I bought 40 over pistons and the connecting rods together. But the rods are used and there not numbered. The crank that I'm buying is reconditioned. So my question is, am I gonna have balancing problems, if I stay with the connecting rods that came with the pistons? And if I am, what should I do? And by the way the rods are pressed into the pistons. Thank you very much.

[383silverado]

have it all rebalanced it's like $150- $200

[Jmark]

86 M.C. welcome to the HR forums!

Were the pistons used too?
Were the rods resized before they were installed on the pistons?

Only the main caps need to be numbered, to keep them in proper oreintation (sp?) in the block.

The rods are sometimes numbered so the cap goes back on it's original rod, but as far as where it goes on the crank, it's not important, as long as it's installed the right way.

If someone prior to you grabbed a few rods from here and a few from there and put the package together for you, it could be a vibrating mess. Unless you KNOW FOR SURE that all the rods came from the same engine, i'd have it rebalanced while it's apart.

[86 m.c]

I still have the rods and the pistons from the original motor and those are numbered. So I was thinking I would just use those rods with the pistons. Also, my pistons are flat tops (the new ones) but I was wondering if dome pistons would be better for more compression and horsepower. Thanks.
Brian

[327NUT]

Forget the domed pistons, old school stuff. Get compression by proper piston pin height, cyl. head combustion chamber and head gasket thickness.