i have a 400 in my dart which is just a 383 with a bigger bore. i think it runs really good, here is the combo-

KB hyper pistons @ 0 deck
eddy heads 84cc milled to 74cc
comp cams roller rockers
eddy performer RPM intake
holley 750 street hp
comp cams XE274 cam
stock forged crank from a 383
stock rods/oil pan
headers and 2.5: duals w/x-pipe
355 gears w/locker