Quote:
Originally Posted by Cuttyman9
Interesting, I wonder why they have a balance shaft if it's the same everywhere else?
I wonder if the block was reinforced further than the gas variants?
Would be neat to investigate.
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The ToroFlow engines did use crossbolt mains, so they were a 4 bolt main vs 2 bolt main for gas engines. In 1973 GMC had redesigned the bottom end of the block only on 478M gas engines with much larger main journals as well as more beef in the main saddle area and much larger main caps & bolts but still a 2 bolt main. When I get a chance I'll take some pics of the newer main caps vs the older main caps and post it.