Quote: I read that article and can not find what bore the BB heads were tested on but I bet it was the bigger 440 bore so on a 383 they will probably flow less wit the smaller bore and since they are almost tied with the magnum on the intake already they will probably flow less on a 383 than a magnum will on a 360 plus you lose the efficiency and no leak sealing of the magnum design. Also the 300 hp crate motor might make 320+ hp but remember the M1 single plane can not hold the jock strap of an RPM air gap AND the truck cam is actually bigger and better than a 300hp crate cam. I bet if you gave both of them the RPM intake and a set of headers the 5.9 magnum would make for a faster car with a broader TQ curve with less leaks and more MPG and weighing significantly less without buying expensive aluminum stuff.
I'm sold i'm sold already! Haha... now yer just getting me excited...
The 300HP crate has a smaller cam than the junkyard 360 does...??? Again, the only really crappy deal is that real UNDER-chassis SB headers cost more than real estate.
