I would love to see the 347 conversion from a SOHC equipped truck that only cost $3700. By the time all is said and done you are looking at more like $10-15K to do it right.......
I am getting ready to build a new OHV for my BII, my 93 4.0 has 150K+ miles on it and leaks oil like a friggin fountain, the rest of my drivertrain is brand spankin new, I could go in and re-do the gaskets, but I figure I'll just build a new one. Don't get me wrong the OHV doesn't miss a beat, but I can get a builder for like $75 and I will do the swap in one day/weekend (keep fingers crossed....).
I plan to dump about 2-3K into thge buildup, naturally aspirated (if I wanted a supercharger I would buy a Mustang or a 2wd Ranger). This will be a nice middle of the road buildup using a 91 OHV block punched .030 over (about as far as you want to take a ohv from what I understand) some 98TM heads with quite a bit of work done to them, 410 cam, ported intakes, and if money allows forged pistons (just in case) Should sit right at 10.5:1 compression ratio. I use my truck for my daily driver, for towing my boat, and for 4x4ing, this 4.0L is a workhorse and from the factory quite a dog compared to what they are capable of. Keep it simple, and get as much torque of of it as possible...
Doug I have a question....
Now that you have upgraded your EEC and harness to the newer stuff have you played with the EEC tuner at all?
I may have access to an EEC Tuner and as I understand it is is just a matter of figuring out the codes for the EEC-IV and the OHV, the support for the 2.3L T, 3.8L and of course the 5.0L is already there. I cant imagine that the OHV 4.0L would be much different????
Also have you ever seen anybody install a 2.9L distributor in a OHV?
I know of people saying they have done it, or they used a 4.0L block with the 2.9L intakes and sensors, but I remember Pat Kunz saying something about the dist. drive gear running backwards on the 2.9L, or something along those lines....
I will be seeking some of your advice when we are ready to gather parts and assemble.
Have you found an electric fan that is adequate to cool a 4x4 BII with a boat in tow? I run he Modine 3 core aluminum rad, with a huge motorhome tranny cooler.
I belive the radiator was actually too large for my old 16" fan, so a all metal custom radiator may be in order..
The problem I have with the electric is fitting one. Between the waterpump pulley and the rad there is about 3-4" max.