First of all, I read this forum daily and have learned tons about the Y block from you folks.  Your knowledge is far beyond any other group of people on other forums , and your willingness to help without making us unlearned feel like idiots is much better than on some of the forums I read.

Now to the problem.  I took my 312 to the machine and had it bored .040 and zero decked.  The rods were rebushed on the little end and resized on the big end.  The crank had already been turned .010 on the mains and .030 on the rod journals so it was just polished.  When I got it back and started assembly, the pistons in cylinders 2,3,4,7 and 8 were sticking out of the hole any where from .005 to .015...., so I thought that maybe somehow they resized them wrong and some were shorter than the others and the short ones were used to measure the deck height.  I took it all back and the machinist told me that he measured the rods, checked them for straightness and they are OK.  He says that the difference is in the stroke of the journals that are long.  He says that if the crank had been turned a couple of times to get the .030 that maybe someone got the journals offset causing a longer stroke, and that some of the cranks came from the factory with not so good tolerances which doesn't help.  Can this be so?  Has anybody else had this problem?  Help and suggestions would be greatly appreciated.  I have built small block and big block Ford before and never had this problem.  I don't want to put this thing together and have to do it over.

Sorry for the long post, but I needed to get all the info out there for you guys to chew on.  Thanks for any help.

Butch

Manchester, TN

Butch Lawson

Manchester,  TN