Quote Originally Posted by tango
I think if you are just looking for a bit more power . And want a set of heads with steel valve seats . Go with the World S/R 305 heads # 042650-1. They have 58cc chambers with 1.94/1.50 valves and HD springs with screw in studs . The heads that are on your car now have 1.72/1.50 valves . I do think the 1.94/1.50 valve will be big enough for any street / strip 283 build . If you want to up-date the intake/carb . Go with that Edelbrock Performer EPS dual plane #2701 and a Holley 570 V/S Avenger . I would also go with an HEI Distributor . If you want to push this engine to 300 hp . Change the Camshaft . I would run the Lunati Voodoo #60100LK . This will be a good street cam . This cam is 207/213 dur at 050 with 437/454 lift . I do think you will be happy with this set up on your 1957 Chevy . COOL
This is a usable set up .