340 Engine Shake

plumkrazee70 said
Interesting. I'll bring it up to him about the bearing spacers.

The 360 bore is 4.00, it would have to go .080 to use my 340 pistons.

340 bore is 4.04 and .040 makes it 4.080. he has a crank for the 360.

When you use the main bearing spacers, you use the 340 crank to make it a 3.31 stroke. Sell the 360 crank, and sell your .040 pistons for the 340. Bore the 360 to 4.040, stock bore for a 340 and buy the pistons in the link below to use in the freshly bored 360 block. The biggest expense would be the bearing spacers.
[FOR SALE] - Used std bore pistons - 340 | For A Bodies Only Mopar Forum

The other most frugal option would be to sell the 340 rotating assembly and buy a set of KB-107's or similar pistons for the 360 and roll with that. I have had dozens of 340's over the years, but I have a mildly built, well-mannered 360 in my 71 Challenger conv. It's a ride around and enjoy it type of car that is plenty fast enough for what it is. My conv has 340 Four Barrel badges on the hood and 99% of the people can't tell the difference by just looking at it. Good luck to you. You've been put in a tough spot with the motor, but just make the best of it for you.
:thumbsup: