Dick, Sounds like weak valve springs if it's mechanical. If it's
electrical, look at the dist. advance both vacuum and mechanical with a
timing light. Doug Odom in big ditch
Dick J wrote:
>
> I'm looking at a vehicle for my daughter. Small
> block Chevy (350) stock (1977) with 2bbl,
> converted to 700R4 or whatever the new OD tranny
> is. The motor sounds good at idle to half
> throttle. Once it goes past half, it pops back
> through the carb. Not a real backfire, just a
> rapid pop,pop,pop like a 9mm Uzi. What do I got
> here? Some burned valves?
>
> Dick J
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