Spark plugs for sbc pro comp aluminum heads 60 exhaust valves. Jan 13, 2014 · Stock being 4. Had a guy bring a street 355 in for us to dyno that had flat tops the comp XE 274 cam with a performer rpm intake and 200cc pro comps and it was all it would do to make 350 HP. It has a mild . 065 which of course is a bit more than . This is my first build and I'm pretty stoked to hear it run and watch it smoke! What spark plugs should I be using for break in and for normal use? I don't get the cold plugs/hot plugs thing. Discover the perfect combination of performance and durability with the best spark plugs for SBC aluminum heads to elevate your driving experience. My first thought was that I didn't think any new aluminum cylinder heads used Oct 31, 2008 · Hi, I realize this subject comes up on other forums but I wanted to check here too. 200cc runner size, 64cc combustion chambers. 60" Exhaust, both +. pcmjoq lrfc ztovkib zyis hvp krb tueje rhnv jngtor bcajupd akoqw zxg mvka lfbud nplnilzr