4.030 340 JE Pistons?????
Bore-4.030"
Compression height- 1.217"
Piston pin .927 o.d. x 2.750" long
Piston weight- 418 grams each
Looking at the specs of those pistons...it probably for a R3 block with 9.20 deck height...small block chevy piston pin size also......the R3 block probably came at 3.91 or 4.00 bore
