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Not Carb but Heads question

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streetjeep:
This is the description. What do you think for less than 800 for a pair?
New pair of assembled sb chevy World Products S/R Torquer series Iron heads # 42660. Cylinder heads are for carbureted 1955 - 1986 small block 327, 350, 377, 383 or 400 engines. (377 & 400 applications for street would require steam holes to be drilled. We can drill the steam holes for an additional $30.00 for the pair. ) 67cc combustion chambers. ( These heads are also available in 76cc versions - see our other lot listings for this chamber size ) Straight plug design. High flow 170cc intake runners. Hardened steel exhaust seats compatible with unleaded gasoline. Heads are adequate for engines with a projected horsepower in the 400 HP to 450 HP range. Integral cast valve guides. Universal end pads accept all early and late model accessories. Heads have both the perimeter and centerbolt holes for valve covers. These heads are assembled in our machine shop. Seat concentricy is checked. Assembled with PBM race series 1 piece EV-8 stainless 2.02 intake valves and 1.60 exhaust valves with chrome plated and undercut stems, swirl polished stem and hardened tips.  New .600 max. lift 1.250 stock diameter valve springs with 110 # of seat pressure, new steel retainers, hardened locks, and umbrella valve seals. Screw in rocker arm studs (3/8") and guide plates are also included. All machine work is done in our own shop on quality equipment.

Zac Agee:
sounds like a good deal considering in the machine shop i work in i cant rebuild a set of heads, put larger valves in with screw in studs and guide plates for 800 bucks. id like to see some flowbench numbers myself to compare to AFR's or Even RHS's but for a mild motor be alot better off then rebuilding a set

streetjeep:
Zac Agee, that is my thinking, especially when I have the stock 4bbl heads off the 68 and would do them only.  But, found another possibility. They are Aluminum Heads. The Castings are ProComp. They are on e-bay through SkipWhite. He says he used to use procomps, but had problems so quit, then after Procomp talked to him because they had improved their heads, he went back to using them. He offers a 3 year, unlimited mileage warranty. Here is a link. Your thoughts?
http://www.ebay.com/itm/SBC-CHEVY-190CC-FULLY-BUILT-ALUMINUM-HEADS-64CC-HYD-FLAT-TAPPET-S64190272-PBM-/350552423001?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item519e8d7a59

Zac Agee:
not a bad deal on a set of aluminium heads we never used procomps out here. as long as the tolerances are good and not a poor casting they could be worth it. i just don't know how good there quality controll is, check with some good machine shops in your area on them doesn't hurt

73 Z28:
 I'd go with aluminum heads. They will not only save weight, but disapate heat faster which allows you to run higher compression ratios. If I was building a street performance 327, I'd use a head like the dart shp 180cc intake runner heads which are about a little more than the 800 you were spending but with dart you get a good product. I believe those heads can handle up to .525 lift. I'd match that up with a comp cams XE262H flat tappet cam a decent intake and headers and you'd have a nice build. Oh and use headgasket 10105117 from GM performance parts with a compressed thickness of .028 which acts just like milling the heads .010 it's free performance(well almost after buying the gaskets)

Paul

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