NOOOO dont sell that thing..... an aluminum donivan block is the ****... im not sure you need a set of 14 deg heads.. (the valve angle is 14 degrees and they flow like a Mo Fo!!!) it sounds like an 900+ Hp engine with a not too radical cam.... naturally aspirated....!
Im not sure what teh banks kit looks like for a BBC... and of ot will work with your heads, my guess is that the heads outflow those logs...if you want turbos i would say that a pair of good "standard" BBC heads was plenty.. somthing like Dart, Profiler or AFR... they will all work better in the lower rpm range and support over 2000 Hp with turbos
why not give Tom Nelson a call and get a turbokit for your application allong with a cam that works with what you want...
intake manifold wise i think i would use a tunelram base with a big water/air intercooler bolted directly to the top...
the below engine is somthing Ray Hall from australia built some years back... and it put somthing like 2000 Hp to the prop in a 19 foot ski race boat....
