I think I’m a bit late here...anyway, I built a Keith Craft short block 331. I initially considered an X-303 cam but opted for the Street Heat Stage 2 from Trick Flow. I also used the TFTW heads and Street Heat intake. I had a 70 mm TB, 60 lb. injectors l, 300 log fuel pump.(I planned to supercharge it....kids started coming and hobby cash going!), new fuel pressure regulator, 1:7 rockers, shortly headers, did a auto to 5 speed swap and opted for the computer from another 92 because, as I understood it then, it would pretty much “self tune” the engine after every change made, so long as you completely drained the power from the system by taking the battery cable off...also, remember to have the system drained when you pull the pill when setting timing. Hook it back up w the pill out and set the timing, then reverse the process. My timing was set at around 24 deg from what I remember from almost 12 years ago now. Some don’t go to that extent but it seems to work better.
It took me a bit to get my engine from running rich. I had to mess with the fuel pressure. After a few attempts and resetting the system and about 5 miles of different acceleration driving, it ran like a champ. Dyno showed 386 hp and 416 fr lbs Tq at the tires. No expensive computer work done. Hope the shade tree and FIRST TIME FORD ENGINE BUILDER tips helped. Before my Stang I had an 85 S-10 w a .030 350, Performer RPM intake, 780 Holly, Vac Secnodariies w Proform chilled main body and quick change secondaries spring, as it was a daily driver...a wicked one!, Pwtronics HEI, 041 small valve heads, 292 Comp Cam, 7:1 rockers and on and on...plus A SECONDARY VACUUM CANNISTER TO ACTUATE MY 780 vacuum secondaries carb because, at idle, the cam has near no vacuum.