what size pickup and lines for a small block...

If you are replacing everything anywayÂ….. Go with 3/8". 1/2" is only needed at extreme levels.

Ma only offered 2 sizes from the factory: 5/16" and 3/8" (even on the Hemi!) If you're gonna upgrade go with the 3/8". It'll be more than sufficient.

3/8 is more than fine,it takes some h.p. to need bigger,Ive run/seen some pretty serious engines on 3/8 and even had a couple 12 second cars with 5/16.

Now these guys are talkin sense. And there right and I agree. A 3/8 line will be able to feed alotta street power. A whole lotta street power.