Hi All. I'm gaining on 60 years old and have been a hard core car guy my whole life. I'm as proud of the great cars that came out of Detroit as just about any American. I think that's probably true of most Canadian gearheads like me. When I've needed speed parts to feed my habit I've spent...
I picked up a set of Schumacher's tri-y headers and they're impressive. Loads of room, easy install from above and I like the ball and socket connection to the pipes.
http://www.engine-swaps.com/Pages/ProductsType/SB_Headers.html
As far as I know it is not programmable, which is why it would only work with an engine in the 375-400 horse range as was intended. As alluded to by Rumblefish you could play with the injector sizes if you had a combination (cubic inches, cam, porting etc.) that could flow more air.
But if...
"Why couldn't this be used a 318 with the HP range?"
The intake manifold in this kit is specific to the Magnum small block; and then the injectors rails are specific to that manifold. So you'd have to source an LA 318 intake with injector bosses and the fuel rails to go with it.
I'm in the midst of installing Mopar's fuel injection kit on the 360 Magnum crate motor in my '70 Swinger and decided to chronicle some of the details for those who may be interested.
http://www.mts.net/~triadpro/Dart/mpfi%20install_01.htm