Re: 1964 GMC "crustine" semi-build.
I'm curious to see if you have an improvement in mileage. Also I read somewhere that adding a crossover pipe in the exhaust stops the popping on deceleration.
Nice work on all these upgrades and videos too TJ; I really enjoy them and looks like you get a lot of views too.
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1961 GMC Suburban 305A Overdrive
1962 GMC Utility 305D
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