donsz
Well Known Member
I'm installing CPP power steering in my 1957 Chevy NAPCO truck, it has a 1965 348 engine. Naturally the left header clearance
needs to be resolved. I saw some headers: Patriot Exhaust Tight Tuck Headers Chevy 348-409 (Oval Ports), that seem to
have a design that lends it self to modification for the is application. The thing is, from what I can see, I appear to have rectangular port
heads. The heads are the heads that came with the engine, which I'm pretty sure was never modified. The reason I'm confused is that
my research says:"Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form.
Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm."
This engine did come from a big truck, so I'm guessing high rpm wasn't what this engine was about. My question: what type
head should a stock 1965 349 truck engine have? Thanks
don
needs to be resolved. I saw some headers: Patriot Exhaust Tight Tuck Headers Chevy 348-409 (Oval Ports), that seem to
have a design that lends it self to modification for the is application. The thing is, from what I can see, I appear to have rectangular port
heads. The heads are the heads that came with the engine, which I'm pretty sure was never modified. The reason I'm confused is that
my research says:"Oval-port heads are capable of flowing enough air to support around 600-650 horsepower in stock form.
Rectangular-port heads (bottom), should be reserved for engines that spend much of their time at high engine rpm."
This engine did come from a big truck, so I'm guessing high rpm wasn't what this engine was about. My question: what type
head should a stock 1965 349 truck engine have? Thanks
don