If you're not more ET/Timeslip oriented the 280 cam can also work with 3.55 gears and a 4spd on the street. The 270 being a decent do it all street cam and the 280 a do it all street cam with a sacrifice of streetability= less lower rpm torque and vacuum for more upper rpm power. 'In a 350' it's really the first step in cams that shifts the power closer to the upper rpm's. The engine employs the classic two-piece rear main seal iron block with iron heads, 8:1 compression. If you have 9.75+ compression (not likely unless you have flat top pistons and the 67-68cc heads) you could go with more cam like the 280 Magnum but even with 202/160 valves it really likes a mild amount of head porting to help it breath. This is what Chevrolet Performance calls the 350/290, which stands for 350 ci and 290 hp. As long as you have around 9.5-9.75 compression then something like the Comp Cams 270 Magnum would work well with those heads, 355 gears and the 4spd. (GM Part 3896962) This item is proudly Made in the USA Product Downloads Corvette Camshaft Specifications (403.
All camshafts meet original Corvette specifications. It had hydraulic cam, a 4bbl Quadrajet carb, cast pistons, 4-bolt mains, and originally a 10.25:1 compression ratio. Description Original style 1969-1970 350/350hp and 1973-1982 L82 Corvette hydraulic camshaft. If you're looking for something as simple as the 350HP cam then I suggest an older design aftermarket cam because they are easier on the valvetrain. The L48, the original 350 small block engine, is one of the most legendary.
