66' Barracuda and 273 with headers

toolmanmike said

Unless you have a real hot rod 273 engine, headers won't get you more than 10-15 HP. 340 manifolds would be close if you must have performance. Most of the guys with 273's don't have headers. The ones that do run headers are running a 340/360/stroker.

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Thanks Mike,
That's the trouble- I am not "most guys" and the machine shop is trying to get me near the 400hp with a high revving 273.
Like we've talked about in a previous conversation a while back. "273 take money to build." I really don't want
a stock 273, but my heart is on a 273 for that car. So she needs to run.

To start with: Let just say they are having custom pistons made with a ring spread further apart than stock and the ring pressure is 1/2 of stock.
Most guy would just drop in a 360 and spend $5gs and be happy... Not me. :thumbsup:
What I am doing is crazy - I get it.
But we only live once!