Iron block has not proven to be any stronger, unless you are after well over 1000 hp, I would'nt take the extra weight. People have made over 1500 hp and gone 175 mph in the quarter on the aluminum block. I am at 1000 hp right now myself.
Patriot heads are factory heads. they are ported factory heads. TEA are the way to go here.
For low dollar, a 427" motor requires a new crank. Not cost effective. An aluminum block ls1 will be a 347, an ls2 block can go a little bigger on the cubes due to having a 1/10" bigger bore (3.898 vs. 4.00)
75's will be perfect and are the largest high imp injector made right now.
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Twin Turbo LS1 '71 Chevelle
1000 hp 93 octane street car
6 speed
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