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Re: Crate 350 in 85 k5 can’t get up to highway speed
What is your all in timing?
What do the plugs look like?
Have you adjusted the carb? Different engine may need different jets and rods.
Plugged exhaust - could be the cats.
You don't have something like a brake locked up do you?
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1970 C20 Custom Camper - 350, TH350
1997 GMC Suburban
1994 Acura Integra GSR
1987 Dodge Daytona Shelby Z
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