Here are a few cams I would use if I had a Chevy 355.
Howards Cams CL112591-08 - Howards Cams Hydraulic Flat Tappet Camshaft and Lifter Kits - Overview - SummitRacing.com Lunati 10120410LK - Lunati Bracket Master II Cam and Lifter Kits - Overview - SummitRacing.com Crane Cams 100072 - Crane Energizer Cam and Lifter Kits - Overview - SummitRacing.com A good friend of mine bought a 1969 Camaro with a 6 cyl back in the late 70's. Then he bought a 350 rebuildable core. He rebuilt the motor using all GM parts from our local Chevrolet dealer. When he finished he had a strong running 69 Camaro, 4 speed trans, 4.11:1 rear. The exterior color was Hugger Orange with a standard black interior.