1. Bill Hitchner on Facebook makes a ton of adapters for Honda k series and other to gm transmissions and Chrysler 904's and stuff. Worth a look.
2. Jeremy Winters (rock ape with lo budget pimping on the old board) runs a JHF portal car with a k24 and likes it. He also used to be a tech at a Honda dealer. I think his daughter won werock west sportsman series with it this most recent year.
3. Moroso makes an oil pan for the LV3 and LA1. But it's nearly $1k.
Get the Best Performance with Moroso Road Race Baffled Oil Pan GM 4.3L V6 Ecotec3 LV1 21148 parts at JEGS. Shop Now at the Guaranteed Lowest Price!
www.jegs.com
4. The factory aluminum oil pan has been shortened by more than a few folks, including SoCalTJMark (Mark Underwood) and Jacob Reeves in their builds.
5. Dan Jost built and LV3 and modified a LT intake for it and runs like 20psi in a grand national. his was more of a high ram style, because car car.
6. I'm running an LV3 in my commando project, and with the factory oil pan and intake, and the factory 6L80E, I'll have hood clearance and the oil pan is no lower than the tranny pan, so with a good skid, I expect to be fine. if I find I need it, I'll pull the pan and install the moroso- but more for the trap doors and oiling than the clearance in my application.
7. If I were buying fresh, I'd look for a chevy express van with the LV1 version of the 4.3l, because it had factory TC hydraulic power steering pump and factory AFM / DOD deleted, and therefore doesn't have the problematic lifters in those cylinders.
HTH