open_road_toad
OBS Enthusiast
I appreciate the input. Only thing I’ve purchased so far is the engine and radiator. I bought the radiator earlier in the summer bc I was having some overheating issues while running the AC in the middle of the summer. I wanted to switch to electric fans so I pulled the fans off a 2006 2500 in the salvage yard. I bought a new radiator for that truck from NAPA. It’s up in the rafters in the garage still in the box.Kinda going about this in the hardest manner possible, but looks like you have already got stuff, and going to follow that path.
Finding a complete donor from an NBS would have likely been cheaper and easier. People get caught up on all the other stuff, when just getting it in and everything working is usually a decent task in itself.
Pretty sure the 6L80 is longer, but I may be wrong. That would require trans crossmember mods, and a custom driveshaft. When these trucks came with a 4L80, and the cheapie non adjustable LS swap brackets work fine too.
Your radiator choice is kinda...I dunno. The factory big block radiator for OBS trucks bolts right in, has more capacity than even the biggest in the HD NBS trucks, and has a port you can use for the stem vent, with a 5/8 to 1/4 hose adapter. Hoses go right up, no problems.
Stock ecm and cam would have been fine for the time being, pretty sure youre going to be over the HP from the factory vortec.
You speak of an unmolested truck, when your swap could almost look factory without all this other stuff.
I realize none of what I am saying is going to be of any help really, but just figured I'd throw that out there.
I’m not 100% on using that setup.