Junkyard Engine Guide - Pauper's Pistons
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Early '68-'69 Cadillac 472s needed a bit of block notching to accomplish it, but otherwise you can turn any 472 into a 500 by running the 500 crank, rods, and pistons. Casting numbers are on the top of the bellhousing near the oil sending unit. The 6238 casting indicates the aforementioned early 472s, but any 5200 block will be the later 472 or 500 with better oil passages. The 8.5:1 low compression engines came out in '71 and lost about 40hp compared with the earlier 10:1 engines, but relieved of their smog equipment any of these is a 400-550lb-ft monster. View Related Article
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