Mikelly Posted December 26, 2004 Share Posted December 26, 2004 Jim McNemare gave me a set of heads and a Crane cam, and all the parts for them... I'm trying to find out what I can on them before I sell them... The heads are Number: 3973487 Chevy Small block steel heads with 2.02/ 1.5 valves. The cam is a crane unit: R-234 -1335-2-12 The setup came with some roller rockers, hardened pushrods, and screw in studs. The lifters are roller lifters and are in excellent shape. Mike Quote Link to comment Share on other sites More sharing options...
Mikelly Posted December 26, 2004 Author Share Posted December 26, 2004 Update... Mortec Says these were Vortec heads that were used on 71-72 350 LT1 applications... 75CC... The heads have been disassembled and cleaned at a machine shop, and looked over. Can't find ANYTHING on Crane's site just yet... Mike Quote Link to comment Share on other sites More sharing options...
HarrisonTX Posted December 26, 2004 Share Posted December 26, 2004 the heads are This is what i got from mortec, ..........used on 71-72, 350ci, LT1, 75cc chamber I looked for a while, but couldnt find anything on the cam. edit:A little late, sorry Quote Link to comment Share on other sites More sharing options...
dr_hunt Posted December 27, 2004 Share Posted December 27, 2004 They didn't have "vortec" heads in the '70's. They are the open chaber vette head, standard issue 2.02 int. and 1.6 exh. not 1.5 exh. unless it has had seats installed, nothing special except to a person restoring a 'vette. By standard issue I mean that they have no special performance value over even the '70 through '72 64 cc head. Things to look for are cracks, low valve seat height, stripped holes. If they look good I'd advertise them in a 'vette forum. The crane roller looks like it might be a 112 lobe center 234 duration at .050 street roller, probably under .500 lift according to this old crane book I have. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted December 27, 2004 Author Share Posted December 27, 2004 Yea, I saw the "Vortec" listed next to it in the MORTEC info on the heads and just scratched my head... But it does show them as I measured with 2.02 and 1.5 valves. The heads were disassembled by a machine shop, so I just used my dial caliper to confirm the size. Heads look to be in clean shape and the cam doesnt' look hurt at all. I'll drop a line to Crane and see what info I can dig up on it. Mike Quote Link to comment Share on other sites More sharing options...
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