I had a friend who was part of our local Pontiac gang when I was a youngster. He would use straight diesel for a couple minutes to de-sludge motors. As far as I know he never killed a motor doing that, and it did appear to get a lot of sludge out, but I still never adopted the practice.
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Ray Klemm calibrated Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear
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