if you haven't found anything yet you might want to look at BG Demon card they are the best in my mind. Ive ran Holley and edelbrock. demon seem to run smoother and get more power out of them. i run a road demon 625 om my 350 it has 9.5 to 1, a voo doo cam street dominator. and I'm getting 16 mpg on the high with it and my truck will get up and go. it has 33's 3.73 and a 4 speed Manuel
my Manuel only has two speeds. He's a nice guy though.