Thread: small block chevy

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i have a 350 4 bolt main block flat-tops pistons,trw floating rods the pistons and the rods might have 5000 miles on them i did a new rebuild on the motor but was thinking of making a 383 can i still use my piston and rods and just by the crank and fly wheel and blancer and will i have to do some machine work to the block or piston or rods and the block is bored 60 over

Originally Posted by demetrice askew

i have a 350 4 bolt main block flat-tops pistons,trw floating rods the pistons and the rods might have 5000 miles on them i did a new rebuild on the motor but was thinking of making a 383 can i still use my piston and rods and just by the crank and fly wheel and blancer and will i have to do some machine work to the block or piston or rods and the block is bored 60 over

You can use your rods.
You will need a different flexplate and a different balancer.
You may need to do some rod bolt prep and also block prep.

what kind rod bolt prep and block prep

Originally Posted by demetrice askew

what kind rod bolt prep and block prep

The block will need a little messaging along the rails/the area where the oil pan mounts to the block. Because of the bigger swing of the crank, the rods rotate in a larger circle therefore the block has to be clearanced and the rod bolts will need a little help as well as they might come into contact of the cam. You will also need new pistons due to a larger stroke. The pins in the pistons move upward within the piston. You might be able to use the same flex plate and balancer, depending on what the machinist says. I like my rotating assemblies balanced internally(meaning within the block area), therefore the balancer and flex plate balance at neutral, no weights.

So about the only thing you can salvage are your rods. If your bearings are still good, and if your current rotating assembly was balanced, you might just want to try and sell the short block and start over.