My 383 .03 over loved the 770 Street Avenger. The heads were ported and polished and it runs like no other 383. I had to increase the fuel line to 3/8" and have not had it back to the track since,

‘72 Charger, 5.9 Magnum, Tremec 5 spd., Pro-Touring
‘14 Big Horn, Quad Cab, 4x4, 1500