2012年6月13日 · 73 cc heads would produce a comp ratio of about 9.1:1, not 8.6:1, so the #47's can't be 73 cc... 83 cc heads on a 350, assuming .016 deck, .045 gasket thickness, and 5cc …

2022年11月19日 · Ok, that looks odd, let me rephrase,” questions about 47 heads, “ just tinkering today, so trying to clean engine, took valve Covers off and some thing looks askew, one rocker …

2022年11月23日 · Pontiac was really fond of the WT code and used it in multiple years. The heads have a casting date of K24 which would be November 2, 1964 making it a 1965 head, …

2008年8月25日 · Using .406" lift number comparisons - The RA II heads flowed 194 CFM @ .400" lift in stock form Pete McCarthy book - (1970 RA IV - 225 CFM @ .400" - Wallace site). RA III - …

2022年1月16日 · 16 or 62 heads because 45 heads are low compression heads and I believe are small valve heads also. 48 heads are off of a Ram Air 400 and you may not be able to find …

2023年5月29日 · The "46" heads were most likely installed to drop compression. Pontiac used the same flat top piston in all their engines and used the combustion chamber size to change …

2024年12月13日 · I'm in a program at my local community college that has a machine shop and I need to recondition a set of iron heads. I've been looking at either a set of 17 heads or 47 …

2024年12月11日 · If you have the 98 cc 4X-3H or the 4X-4H heads on a 455 they will work out to around 9.2:1 and that is premium fuel territory. If you have the 4X-1H heads you are good to …

2022年8月19日 · exhaust port of heads 7J2 seems to be smaller heads so, it may be a firebird engine built a little weaker HP. In fact for every year starting or after 1970 that block with …

2024年12月15日 · HLB02 Pontiac Head L brackets FOR 1972 Pontiac heads | eBay This kit includes 4 brackets (2 front and 2 rear) 4 short 3/8 bolts (to mount brackets) and 4 - 3/8 nuts …