13:1 Compression Pistons in 340 Small Block

I'd build with the pistons just because there's so many saying not to. A mechanical flat tappet with 235 to 240 degrees duration @ .050 lift and say 560 lift will keep the power below 6000 rpm. Clean up you J heads with a good pocket port and valve job. What this combination will have is a very good torque curve that will peak at about 4000 but I wouldn't be surprised if it had 90 percent of it at 2500 rpm, excellant for a streetcar.

Just too be clear I'm talking e85........