It appeared to be clearance as the sides on two of the pistons are ripped up pretty good. Probably didn't help that it was running a bit warmer than it should have.
Like a said earlier, this was a pretty "high end" build, Milodon gear drive, solid roller, polished the side beams on the SD forged rods, balanced, stud girdle, domed pistons, some head porting, etc. The owner did tell me that although it made good power, it refused to idle well, and they were making efforts to tune the engine for better street manners when it developed issues and had to be pulled out.......Cliff
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https://cliffshighperformance.com/
73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile),
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