Since starting this tread over four years ago I've learned a ton about PRV building.
Eventually I decided to totally rebuild my 2.8L after discovering some nasty buildup in my waterjacket presumably from old coolant decomposing.
My original 2.8L was fitted with 3.0L heads, Isky regrind cams, headers, x pipe exhaust, custom intake manifolds designed by me, Borla/TWM ITBs, and full sequential EFI and distributorless ignition courtesy of MS3x. Lots of tuning help from FABombjoy.
I decided to stick with the 2.8L bottom end because I prefer the odd fire sound vs the even fire variants.
Turned out to be a very unique engine. 2203 now performs a lot better than it did before, especially since it has a 5 speed now!
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