Customer brought me a short block to fix, ate 3 lobes off of the cam, long story short, i know its got KB pistons with that goofy compression step, and valve relief, it got a set of H beam rods I believe to be 440 source. but I cant find any definitive info from them on if its a source rod or not. Only thing on the rod is a laser etched number, 3960W.
Customer had a set of Indy heads already bought for it, and is going hydraulic roller, and I know he will be fairly hard on it, and I dont want a parts failures and have read horror story after horror story about Source rods, and Hyperutectic KB pistons.
Can anyone ID these rods?
The only horror stories I’ve ever heard about 440source rods came from the OLD I beam rods they used to offer. We warned several members not to use them but they went ahead and tried them with bad results. I personally ran 8.60@155mph with them for 275 passed till I found a crack in the block. The assembly is still going in a street car many years later.
