Hi All,

I picked up a Holley 2300 350cfm 2 barrel without any jets and am thinking on running it on my stock 292 Chevy in my 66 K20. Any input on main jet sizes to try out? I'm at 1000ft elevation. Thank in advance.

I'd suggest starting with the jets Holley sent it out with originally. For the PV I'd start with a 4.5-5.0 unit.

That's the issue though -- I bought it used and the main jets were removed.

61 main jets and a 8.5 power valve were standard.

Thanks! I'll give them a try.