Depending on the specific piston/rod combination that's being used, either the piston, or the rod needs to have a bushing installed to adapt the wrist pin diameter. The stock Nissan rod has enough small end diameter to be reamed for a bigger bushing, while the H-beam tool steel rod uses a 22 MM wrist pin and the piston needs a reducer bushing in the wrist pin holes to match the smaller pin. Nothing anyone with the unmitigated gall to call himself a "machinist" can't handle with a piloted chucking reamer and a Sunnen hone!
Since the big end of the rod is narrower than a stovebolt item, bronze thrust washers need to be installed at the top to keep the top of the rod centered in the piston and make the rod bearing ride the middle of the crankshaft journal over the oil hole.
I've only found one machinist in middle Tennessee willing to offset grind crankshafts and he stays booked solid around a year in advance. That's why I bought my own crank grinder. Now it's just a matter of getting the shop wiring upgraded to 3 phase power so I can use it, plus a couple of other pieces of 3 phase powered equipment. Coilover practically gave me a rotary 3 phase setup- - - -now it's just a matter of getting off my lazy behind and getting it wired up!
Jerry
