[jared1970]

I just finished a similar 428 build for my '70 Cougar, exception being single four barrel instead of your dual quad setup. I've got a set of Edelbrock heads, with bowl and valve work done by Keith Craft, along with some better valve springs. I'm running an Edelbrock Performer RPM intake manifold. For a carb I've got a Stage 2 Holley 750 vacuum secondary carb from Jet Performance. I'm running Performance Distributors distributor. I had Cam Research do a custom ground hydraulic flat tappet cam: Lift Int. .540 Exh. .565; Adv. Duration Int. 291 degrees Exh. 295 degrees; Duration@.050" Int. 226 degrees Exh. 234 degrees; Lobe seperation 109 degrees. I'm running about 10.25:1 compression, an Edelbrock water pump, and Hooker Super Comp headers (1 3/4 primaries). Behind the engine I'm running a C6 with a Neal Chance 9.5" converter, about 3200 rpm stall. I've got 3.50 gears, L60-15 Mickey Thompson tires, and my Cougar is a bit heavier than your Mustang. With this combo I can downshift into second getting on the freeway and lay rubber with those big Mickey Thompsons. It's perfectly streetable, runs dead-on 180 degrees all the time, never pings on 91 octane, idles at about 950 rpm, and has respectable fuel mileage (~10 mpg if you keep your foot out of it). The engine I built is pretty mild compared with some people's engines, and its still a lot of fun, and I'm sure it will last plenty long if I treat it good. As long as you don't try to turn your 428 into a high revving screamer, which it was never meant to be, I think you'll have one of the best and funnest street engines ever made.