OK I think I'm going with new heads and I was wondering if you guys can tell me which is best for me, and how much HP I will gain from each?

--LT4 heads-gmpartsdirect.com P/N 12363287
Price- 1230

--Combination Motorsports (http://www.cmotorsports.com/LT1heads.htm) Stage 1X heads
Price- 1145

--Thunderracing.com P/N 44-LT1-S1
Price-1750

-http://www.flow-technics.com/street/street.html What stage? 2?? Will LS1 heads fit?

So what should I go with? I'm going with N2O next spring and I'm looking to maybe go in the 11s. Of course, I'm going with a new rear (3.73s) and DRs....how many hours will it take a mechanic to pull the heads off and install new ones? So anyways, how much HP will each of these yield, and is there another site with heads?

 

port yours at the local machine shop, about 600 !!!!

install them yourself , 80 bucks for new gaskets!!!!

 

LS1 heads won't fit.

 

How much HP will I get from heads that a shop does comapred to all of these?