Huy350Z Posted April 7, 2002 Share Posted April 7, 2002 Hi, I found a set of rusty cylinder heads in very decent shape in my garage this morning. Casting # 3927186 and the intake valves measured ~ 1.9 in. I want to build my 350 SBC to around 320-350 HP and wonder if these heads can help me reach that goal. Thanks for your help in advance. Huy Quote Link to comment Share on other sites More sharing options...
Guest grinsha Posted April 7, 2002 Share Posted April 7, 2002 They are 68'-72' High Performance. The engines they came on were rated from 300-370HP. Quote Link to comment Share on other sites More sharing options...
Huy350Z Posted April 7, 2002 Author Share Posted April 7, 2002 Thanks for your info. Huy Quote Link to comment Share on other sites More sharing options...
Mike C Posted April 7, 2002 Share Posted April 7, 2002 The 186 casting is one of GMs best production heads. It is also available with factory unshrouded 2.02 valves and screw in studs, but very rare in that form. Get David Vizards book "How to build and modify small block chevy cylinder heads" a very useful text on small block heads. He tests a set of his own 186s that flow 270 cfm on the intake. Quote Link to comment Share on other sites More sharing options...
Huy350Z Posted April 9, 2002 Author Share Posted April 9, 2002 Thanks Mike. I took your advice and went to B&N today. Man, it seemed like all the combos that David Vizard recommeded in that book used the 186 heads. I now need to find someone to rebuild them. Huy Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.