[Enginetime]

See if you can bore out one of your 390's to 428 std bore! A sonic check will tell you. About one in three willk pass or if you have a truck 390 with a (105 number on the casting) this will bore to 428 std. no problem. Then you can run a 428 crank, 4.13 ross pistons, ect. Can be done on a budget but put the bucks into head work or edlebrock AL heads. Comp cams makes a great extreme energy cam for FE's, choppy idle, 2,000-6,000 rpm. Nice package and have done several with good results.
Mark