Need ya'lls opinions on SBC heads
Hello fellow hot rodders, I built a .030 over 350 flat top motor instead of the 327 for my '68 Impala. The motor hasn't been decked or anything just the overbore. I put my "186" camel hump heads on it that have been cut 0.010, previous owner ported to the max, on the runners anyway, 2.02/1.60 valves, screw in studs and guide plates. I'm running an Isky 284 Mega cam, 236/236 @ 050/ 0.510/0.510 lift on a 106 LSA with matching springs. I went with Doug Herbert anti pump-up lifters. Pete Jackson geardrive, TH400 with a Hughes 3500 stall and running a 3.73 gear, will be changing to a 4.10 over the winter months. After breaking the cam in I found one lifter that is bad, bleeding down very fast, so I pulled the intake, Tunnel Ram with two 1850-2 600 Holleys, and am going to replace all the lifters. Well, right after I built the 350 and put it in the car I ran across a 400SBC thats standard bore and it came with a pair of brand new, new style, Patriot Freedom heads for a super good price so I bought it. Now, i've got the intake off my 355 to put the new lifters in so my question is, do I leave the "186" heads on it or would I be able to tell a large difference by putting the aluminum Patriots on? If so, now is the time to do it lol. I haven't driven the car much at all due to the bad lifter but when I did drive it down the road, that's when the ticking started, the motor has very good power. This is my weekend toy for next year and it will be on the drag strip very little for tuning purposes and to have fun with my buddy's. My next build is gonna be the 400 for my S10 with just an RV cam and a good set of heads as it's going to be a semi daily driver. I value ya'lls knowledge alot and have done a whole lot of reading on here. Thanks
Last edited by Camaro_Nut2001; 11-01-2012 at 09:33 PM.
Reason: Forgot to ad LSA on cam.