That will work. You need to cap off your MAF pipe/sensor. I typically use the MAP hose to the vac block. If you have a vac leak the smoke will find it. I typically see the throttle body shaft seals leak alot.
Your trans case could be welded as long as the dowel alignment holes have not been compromised or internal components not damaged. I had this happen by a shipping company.... Was able to repair but it looks like Frankenstein. Fingers crossed the internals are good on both your engine and trans!!
I'll be interested to see what your rotating assembly looks like. Agree on the block. I've seen 109s live for a long time in the upper 9s and others have kept them alive in the high 8s. But you are making that kinda power based on the MPH. The cylinder pressure is up there. Cut the 60 down and...
I remember seeing you at the end of the track. Saw the fluids pouring out and was worried about ya. Sorry to hear that about the engine. And trans! Damn.
I have one... Kinda collectors item but fits well under a stock turbo heat shield. Flow is decent but most go with a Terry Houston down pipe or that style. I wouldn't be afraid to run it. Make sure it's a 3" they make 2.5 and 3" I believe.
Wish you were closer to OH. I have a really nice set that I had re-chromed. Even straighten the factory flaws out of them. The rear has some waviness in the center below the impact strip.
I think someone had a NOS rear for sale on the board for sale for around $750.
It's tough to find really...