The GM ls7 heads require a minimum of a 4.125 bore. The ls3 has a bore of 4.065, so it's a no go for the GM casting.
There are aftermarket companies making a "small bore" ls7 head that will work on an ls3.
Yes sir, I was just clarifying that for you. I didn't want to see your post get misread, and someone led to believe that the cheaper ls7 casting would work. The aftermarket small bore ls7 heads are considerably more expensive.
The OP (Matt) has decided to go with an LS6 engine (383). Matt here is a supercharger that would work for your application. http://www.whipplesuperchargers.com/...sp?ProdID=1230 I checked and Katech Oil squirters won't work for an LS6. Brian Thomson of Thomson automotive uses factory oil squirters, but I think they only work for Gen IV engines. Although, you can contact Brian to see if it will work for LS6. Anyway, good luck with your build.
Brian Hobaugh SCCA National Tour June 2014
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