[mstngjoe]

Originally Posted by 69 Mach I

I am at 325 rwhp behind a c6 auto which should equal 415 hp at the fly. I had had some timing issues and was running very rich but those problems were corrected and I picked up 25 hp just like that.

I corresponded with Total Engine Airflow who told me that they had seen the same engine make 30 hp more at the rear wheels compared to RPM Performers so I would definitely see some power by either getting AFRs, ported TF Track Heats, or to a lesser extent, porting my RPMs. I figure if I have the power in my engine, why not?

What carb & cam are you running?

I'm an AFR fan. Had some 185s on my 331 and have a set of 205s waiting to go on the current project (408).

I originally had a set of Performer heads that I was going to put on my 331. I got a smokin' deal on them because they had some damage from a blown head gasket. Had them freshened up and milled .010 to bring the compression down some. After I cc'd them the chambers were still too big to suit me. Sold them on ebay with a set of Omega rockers.

If it were me, instead of shelling out that much for the port work on the heads & intake, I would blow off the heads and buy new AFR (or whatever you prefer) and go from there.

If you go to www.airflowresearch.com and look at the top of the page you'll see an "Articles" section. At the bottom of the articles page is the complete MM&FF series on SBF cylinder heads. If you look at the Group 1 & 2 sections you might get enough info to help you decide.