...one of the other ponderings I'm pondering is just how much power would be 'prevented' if I simply ran 318 manifolds on my magnum 318...I mean really - how bad could it really be. I figure 318 manifolds are to a 273 what 340 manifolds are to a 318...at least an LA 318...but magnum exhaust ports are really quite a bit smaller compared to LA ports, and I'm just wondering if I'd ever notice any seat-of-the-pants difference running 318 manifolds on my mag 318 (with a nice 340 street cam), od 4-speed, and 3.23 rear gear. The car is being built to be a fun street/highway cruiser - not a track car - just a nice fun driver. Even if there was a power limitation...I'm not sure I'd ever notice.

I want the car to feel like my original one was, and it had a basic 318 with 360 heads, 4-bbl cam and intake/carb, 3.23 gears, and od 4-speed. It was so perfect - fun to drive but not so powerful as to get myself in trouble. I'm wondering how much power that LA 318 had compared to a stock magnum 318 (and OE heads) with a similar cam.