Which connecting rods to use

Is that air I see under your front wheels? I would consider that a severe build...
Most guys building a 400hp or less motor should be fine with properly built stock rods.

I used Eagle I beams in my .638 roller w2 12.5:1 motor... but am using polished stock rods in this next motor...10:1 , ported J's , Lunati 403 , dougs header and LD340

I used these rods in an old 340 4sp dart ....launched at 5000 and ran high 12's.
They checked out fine at the machine shop for this build.

Now I've Jinxed myself... I will throw a rod in first 100 miles...lol