340 changes

the pistons pin height was lowered approximately .100

you will need to change pistons if you want the compression ratio back to the 71 and older engines...

dont know exactly what date they changed cranks..but it was late 72 and all 73 had cast cranks....

look at the balancer/damper on your 340......340 cast cranks had a balancer that says "for 340 cast cranks" on it..


at good set of pistons for the 340 is a KB 243.....just follow KB top ring requirements..

http://www.summitracing.com/parts/UEM-KB243-030/