I have an 1981 sbc .060 and I have a crane cam part #113941, it has 216 duration at 50 intake and 228 duration at 50 exhaust, it pulls just over 300 ft/lbs @ 2800rpm on the dyno in a pick up truck. Mind you it also has flat top pistons, 110 gph fuel pump and a 600cfm eddelbrock carb. You can get better low end tourque with a stall coverter 300 - 500 rpm less then your peek. Also changing you rear end to 3.73:1 will help to if its a daily driver. If not and you want it for the strip I would go with 4.11:1 rear end
350 bored .060 is 360ci
a Chevy 350 bored .060 over would be 360.4 cubic inches
No a 383 is a 350 with a 400 crank. A 350 bored 60 over is 361 cubes.
10 degrees with a stock cam
.060
.060 thoundson gap
.040 is the best, But you can go .060 over but it may try to run hot in the summer time.No more then .060 cause after that the cylinder walls are to then.
88 - 95 = .035 96 - 98 = .060
It's a .060" over 350 with a 400 crank
I've seen pistons that were .060" over. Any more than that would probably not last very long.
The Spark Plug Gap.060 (In thousandths of an inch)
360.42 Cubic inches. Math people. Pie (3.14) times the radius (stock Chevy 350 bore is 4.00, .060 over is 4.060, radius = 2.030) squared. Multiply by stroke, stock 350 is 3.48 in. then multiply by 8.
Depending on the piston type you are running, you would bore .030, .060, .090. Or, .020, .040. At .030, you come out to 355. So, at .060, 360.