408 build

My 4.8 is getting tired. Need a project for the winter... besides a 6.0 iron block, what do I need to build a 408 with around 11:1 cr, ready for nitrous.
can I get away with using 862's ported with big valves? Or is there another head I should be looking at.... since this is going to be a N/A setup plus maybe a 150-200 shot, what sort of number will I be seeing?

Thanks

I'd look at a set of 243 (LS2/LS6) heads for that build.

I have a post on here somewhere that details all the goods inside my HKE built 408ci engine.

http://www.ls1truck.com/forums/mecha...ew-engine.html

the saga continues...

http://www.ls1truck.com/forums/mecha...56-s-back.html