Runs ok on 12btdc. No ping. Going to leave at 12 till I can get it real hot and be sure.
Then back to the dist springs.
Car isn't any faster or quicker now that I can tell , but it seems to run better or smother than when advanced. Try to get a compression test this weekend.
Thanks
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 1970 amc rebel 4-door, faded blue paint,290 emblems on car, 455 under the hood.Turbo 400,3.15 gear.
Best so far 1/8 et,8.90 on street tires,
Since that I have added 400 heads.
I call it a rat sleeper.
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