What about 441 heads??????? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lukecp · 02-06-2004, 06:48 PM

IMO, $530 for a pair of 194/150 smog heads isn't the best way to spend your money. For a few hundred more you can have some brand new aftermarket heads (Dart, World Products, Pro Topline, or even a pair of Vortecs).

58cc 305 heads (which is what the 416's are) will bump your compression around to 10:1, and require 91-octane or higher fuel with a flattop piston 350. The 74cc heads will have you in the 8.5:1 compression ratio unless you go with domed pistons. Not the greatest for a performance engine, although you can easily run 87 octane.

02-06-2004, 06:48 PM	#1
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	IMO, $530 for a pair of 194/150 smog heads isn't the best way to spend your money. For a few hundred more you can have some brand new aftermarket heads (Dart, World Products, Pro Topline, or even a pair of Vortecs). 58cc 305 heads (which is what the 416's are) will bump your compression around to 10:1, and require 91-octane or higher fuel with a flattop piston 350. The 74cc heads will have you in the 8.5:1 compression ratio unless you go with domed pistons. Not the greatest for a performance engine, although you can easily run 87 octane. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg



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