[Janih]

PC3002-0804-0060 Stamped. Cant find anything from the internet.

 

[Malibu ss 64]

Think 3002 is the part nr not sure on the rest. The info I can find says 190 cc 2.02/1.60, straight or angle plug avaible, 64 cc, dual valve cover bolt pattern(perimeter and center).
Think flow number are posted on speedtalk.

Pro Comp Heads Flow numbers - Don Terrill’s Speed-Talk

Also a eBay listing. Guess the S after the part nr in the eBay listing stands for straight plugs?

PROCOMP SBC 190/64CC COMPLETE ALUMINUM HEADS WITH STUDS & GUIDE PLATES | eBay

64cc Chambers. With 5/16 guide plates and 3/8 or 7/16 rocker rocker studs (MUST SPECIFY). New Complete set of Aluminum Small Block Chevy Motorsport heads. We also do custom in-house heads along with custom cams.

www.ebay.com

 

[1971-Chevelle]

Those heads are junk - same ones I had on my 377. Since the intake ports are taller due to the dual intake bolt pattern, you will have to use the correct gasket to get them to seal properly (I don't remember which one I had to use). Do NOT trust the springs that are on the heads, unless they are name brand springs - if they are the springs that came with the heads, toss them in the trash.

Also, double check the spark plug seats. Mine had the seats machined too far down, so half the spark plug threads were exposed in the combustion chamber (they called for a 3/4" reach gasketed plug). This resulted in carbon build up on the plug threads, which caused the threads in the heads to get damaged when the plugs were taken out.

 

[Janih]

Those heads are junk - same ones I had on my 377. Since the intake ports are taller due to the dual intake bolt pattern, you will have to use the correct gasket to get them to seal properly (I don't remember which one I had to use). Do NOT trust the springs that are on the heads, unless they are name brand springs - if they are the springs that came with the heads, toss them in the trash.

Also, double check the spark plug seats. Mine had the seats machined too far down, so half the spark plug threads were exposed in the combustion chamber (they called for a 3/4" reach gasketed plug). This resulted in carbon build up on the plug threads, which caused the threads in the heads to get damaged when the plugs were taken out.

So your heads was with exactly the same part number? Have to check the plug threads, thanks!

 

[1971-Chevelle]

So your heads was with exactly the same part number? Have to check the plug threads, thanks!

Those are the same exact heads that I had. However, it doesn't matter if I had the 3002 or the 3001 heads - ALL of the heads from Procomp are junk. That is why they changed their name to Speedmaster, so that people would hopefully forget how crappy their products are.

 

[StevenS]

They are Procomp and made in 2004. That was the very bad years. I think those years were very thin and with soft guides. The newer ones work fine if you add your own hardware and check for core shift. I know many people that had good results if you do it bare. But as always you get what you pay for. If you do use them check them carefully and use good parts not procomp parts. YMMV

 

[68Chevele]

I had one set of Procomp heads I ported for someone and they were the only set of aluminum heads that ever gummed up my carbide bits. The Procomp intake while an ok piece did the same thing.