Approved for IMCA Hobby Stock, Sport Mod and Stock Car classes (using 500 carb) as of 4/27/2020. Comb Chambers: 64cc (SC) 76cc (SM/HS/BARE). Intake Valve Dia: 1.940. Intake Port Dim: 1.100" W x 1.925" H. Intake Gasket: Fel-Pro# 1204 or OEM type.
Exhaust Port Dim: 1.340" W x 1.300" H. Exh Port Location: Stock location & bolt pattern.Head bolts: Stock bolts can be used. 0065 = 1cc Flat Mill. Pistons: Most 23° aftermarket pistons. Push Rod length: Stock (Stock length = 7.800) Must measure. Push Rod Guide: Stock type, integral. Retainers: Steel 1.250 = (7°). Rocker Arm stud: Use screw-in stud w/integral nut. Spring Cups: N/A, Use hardened shim or locator. Spring Pockets: Cut for 1.250 OD. Valve Length: STD = 4.890.
Valve Guides: Integral cast into head. Valve Guide Spacing: 1.890 moved.Valve Seals: Cut for umbrella seals. Valve Seats: Exh = Powdered Metal. Valve Seat dim: Exh - 1.650" x 1.280" x. Int = 32° - 45° - 60° - 70°- 80°. Exh = 37° - 45° - radius. Head Bolts = 70 ft/lb (w/ oil). Rocker Studs = 55 ft/lb. Block Use: Any SBC, Iron or Aluminum. Weight: 52 lbs Bare - 58 lbs Assembled. Nice casting but all 4 required surfacing. By JP on October 15, 2021.
Way cleaner casting quality than the EQ counterpart we were using prior. Made in the USA is a big plus for me. Required 2 passes on the surfacing machine to get them truly flat so you will spend a little on the touch up. Seats were spot on and sealed perfect out of the box.
Spring pocket depth was spot on consistent. Yes, I recommend this product. I recommend this product to anyone.By Trev on January 26, 2021. Please take advantage of the "add to cart" button on each listing to get everything in your cart prior to completing checkout.
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