posted December 20, 2002 08:37 AM
A friend of mine is cleaning out his garage and has a couple of sets of sbc cylinder heads. One set I am not familiar with - casting #520. Does anybody have any information on these heads? (CC, flow, good for racing?).
posted December 20, 2002 09:09 AM
ok this is what I fond on mortec.. 12552520 is 97-up 305 vortec,truck
3884520 is 60-67 383-327 60cc it may say made in canada on itand it was also use on studebaker..thats all they had on it..
posted December 20, 2002 10:25 AM
These are the 3884520s.
jhon hollomon Member
posted December 20, 2002 10:48 PM
Those heads came on 283's and 327's beetween 60 to 67. They have 1.72/1.5 valves and a 60.5 cc combustion chamber. Hope this helps.