Shorty headers for 360 in A body

autoxcuda said

I thought there were dyno test that HP cast iron manifolds are about the same HP as TTI shorties. Not much gain. So just compare price of repro cast 340 manifolds vs TTI shorties.

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@273 to the white courtesy phone

(iirc the test was 360 logs, 340 mannys, shorties, tti 1-5/8 & something else (step header design) and a 1-3/4 long tube?)

anyway, i wanna say that the 340's and shorties were within 4~5 hp&tq of each other across the range.