not picking on your manifold choice.. what are you trying to do?
save this idea for the fbody race car...
i see in your sig somethings have been done... i think your looking for
something that doesnt exist or youve got some issues elsewhere in power
devolpment...
4.10 tells me you are racing a 1/8mi, stall (? stall) and thats it....
the tune is good, but there is better..
get a better exhaust before wrinkling the OE system intake manifold...
and get a camshaft in there that works better at 3500-6200rpm...stock
isnt that camshaft.
http://www.ls1truck.com/forums/front...in-budget.html
airdeano