250 HP 327="power pack" heads, small 4 bbl (either Rochester 4GC or Carter WCFB) and exhaust manifolds with 2 inch outlets 300 HP 327="double hump" heads (with 1.94/1.50 valves), larger 4 bbl (Carter AFB on corresponding cast iron intake manifold), and exhaust manifolds with 2.5 inch outlets Those specs cover '62-'65. In '66-'67, there was but one 327 in full size cars; it had double hump heads, a variety of 4 bbl carbs (AFB, AVS, Holley, or Rochester Quadrajet), and the 2 inch outlet exhaust manifolds, factory rated at 275 hp.
the 283 "powerpack" had a TPEE identifier on the front of the head (same place the double humps can be found) right or wrong any engine with this identifier was called a POWERPACK head a lot of 327"s had this head
It seems like most of the 327's I ever messed with had a "double hump" 461 or 462 head of some sort on it. Some of them were high performance, some of them weren't. Larry T
With all the work everybody is doing to figure out the casting numbers, I tried to go on the Mortec site, but it won't open. Must of dissapered in cyber space!!! Anyone have another site that decodes SBC casting numbers??
The last 3 327's I tore down all had 461 humper heads 2 were out of chevelles one out of an Impala they were all 1965 or 1966 motors. all 3 had H coded suffix's
Ya just gotta know the secret handshake. http://web.archive.org/web/20080518030656/http://www.mortec.com/
Thanks Larry T, I edited my Mortec link. Internet Archives to the rescue again!! I go there for their live concert archives all the time. Wher else can you find 8,000 Great. Dead concerts, 500 New riders, 500 Donna the Buffalow, even Warren Zevon??? Makes my eyes red just thinking about it!!
The Jalopy Journal
