I want to build my own manifold as well. If you find a way to make them easily, we will be in business! haha
Also, I forget what trans you said you were using, but it will be tough to get the NV4500 to fit without a body lift, or skidplate drop, you could probably do it, but it will be a pain, and you will have no room to work on anything if you need to. I probably could have fit everything with stock springs and no body lift, but, it is just much easier with at least a body lift. you can see how much clearance I have under the hood from the one photo aken from the side
Jeep 1:Used to have a 93 YJ 2.5l- 3.5" Black Diamond, Chevy TBI 5.7l V8, SM 465 4 speed, 8.8 rear( 4.10, L/S), rhinoline, Mile Marker 9000, NP 231, Had to sell it due to college
Jeep 2: 89/91 YJ, 4BT Cummins, NV4500, NP 231, Old Man Emu 2.5" suspension lift, 1" body lift.....Runs and drives, but very much a project
Interned at Novak Conversions 2 summers ago
Ask me about my 4BT Cummins Motor Mounts!!