The 228 and the 235 share the same bore size (3 9/16") but I'm pretty sure the compression height is different, and I know the wrist pin diameter is a LOT different. All the GMC sixes run a 7" long rod, which will make a difference in the wrist pin to deck length between GMCs and Chevy engines, and the GMC rod has a much heavier construction. The GMC rod is also gun-drilled to provide pressurized oil to the wrist pins.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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