O.K....here's the correct info...CASCAR engines are restricted to a 390 cfm 4 bbl carb
The standard Beauchamps CASCAR engine uses a 340 replacement block
4.06 bore, 3.58 stroke, 371 cu in
521 hp @ 6400 rpm, 472 ft. lbs. @ 5100
comp 10.0:1 dry sump w / razor pump
solid flat tappet cam .555 / .555 .252 / .252 106 centreline
heads are W2,390 holley 4bbl. Mopar ignition, 1.75" headers
Cascar is owned by Nascar
this actually might be a not bad street engine, and would make much more power with just a bigger carb