Two things are a fly in the ointment here!
First off running even stock KRE heads puts you right at the threshold air flow wise of what that T2 intake can flow, no less if the heads are reworked to flow upwards of 290 cfm!
I can’t think of a greater waste of money!
The next issue in regards to your first and second build choice is the exh manifolds your running.
Getting to the 600 hp level will be tuff without running the optional big size exh manifolds and a 3” exh system if your not there already, and forget right now about making good use of high port heads and topping the 600 hp mark by much while even running the big size exh manifolds, you will need headers!
I have spent a whole bunch of time heavily reworking a T2 intake( no welding But epoxy) and 285 cfm up from the stock 260 or so was it , and it needed a 1.5” spacer to really work right besides!
Where talking RA4 port size or better all the way to within 2” of the start of the transition to the plenum and then even more of a expansion rate kicking in and then that getting blended into a 2” spacer.
You did not post what your running for a carb, but with the high ports something more like a 950 is needed.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
Last edited by steve25; 10-10-2021 at 12:35 PM.
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