Help with QF HR-750

JamesRR said

My card says 6.5 power valve. If im only pulling 5" I need something like a 2.5 valve? Is that needed in both bowls? Thank you

Click to expand...

Most carbs just have one power valve on the primary side.....but.....that is a pretty low vacuum reading for a relatively small cam. I would double check for vacuum leaks and increase the initial timing before spending money on any parts...JMO.