Is that Inovator Gas Analizer sold by Billy Mays.

We've run two 500 cu in engines w/ the six pac set-ups both a little under 600hp. One used 69 center w/87s outboard, the other 66 center and low 80's ouboard.

I would guess that if you used 64s and 84s you're not to far off, and the not pulling past 6000 might be from something other than jetting.

Right! 1st one, the Analizer,have'nt a clue;but it is instant & broard in readings.
The Hughes Engine site column; funny, i just come to here from reading that very item. [Edited by Moparts - Keep it clean]! does that mean i have to send my manifold all the way there & back.
BBS67, thanks for the coments there. I have all Brand-New Six-Pac,so i guess i better go a huntin!
I may just bite the bullitt & get 1 of Hughes Manifolds as the cost versus the next 20 yrs i hope to still have the car tells me to forget cost & just get whatever it takes to make some serious grunt, but still streetable.
Thanks Guys!
Mike.

I just pulled #7 and #8 plug since those were the easy ones. I am running rich. I have 78 on the passenger side and 83 on the drivers side. What number should I go with? I am using NGK-BCP6ES plugs gapped to .45. It is timed at 14 initial and 35 total. I am running aluminum manifold with blocked heat cross over.