**UPDATE**
Went through a bunch of checks and found that the engine timing was 180 off. Pulled the distributor and wired it up correctly, was able to start and operate.
Good news is that truck works, now there is a bunch of fine tuning needed to get things squared away.
Despite a 4.6L conversion with Crower cam, engine is gutless and underpowered almost worse than the 3.5L that was previously in there. I suspect timing is still off, though when I set it to what appears to be 10-12 degrees off TDC it feels like its idling way too high. The tach isn't working but the wire appears to be connected and I cleaned the contacts. Not quite sure what's going on there. Timing the engine based on the Tach wasn't an option so I timed it based on how it should sound/run. Timing it this way seemed to work though the engine just doesn't have any power. I took on a test drive the other day and pulled a series of mid to steep hills and was losing 10-25mph depending on the hill. I was also only getting 11.5mpg despite not having any notable power. If I can figure out how to get the tach working this might help, also may need to pull the distributor again though I think it is where it should be. Any thoughts on how to fix the tach? Sure would make things easier.
Another thought on being underpowered is wondering if the 3.5L injectors were still in use and maybe it needs 4.6L injects. The information I got seems to be unclear and I'm not quite sure how to check yet. If 4.6 injectors has a high likelihood of solving or at least improving the power issue, I'll just go ahead and swap them out.
My turn signals aren't working. I've changed the switch unit in the steering column and cleaned contacts/changed bulbs. Not sure why else these aren't working.
The engine also has a light tick to it that doesn't sound right. The ticking is very similar to the ticking from those old board games with the spinny wheels like "Life". It increase and decreases with engine RPMs. It sounds as though it may be coming from the water pump and/or water pump pulley. The pulley almost looks as if its unbalanced and I noticed it only has 2 out of 3 bolts securing it. Not sure if this is a cause or contributing factor.
During my test drive the engine timing appeared to be slipping to a point where it would almost stall out and the oil level light would flicker once or twice then turn off. Also wondering if ticking sound might be insufficient oil level and may be coming from the cam or perhaps a lifter. Oil level was appropriate so not sure if Lucas electronics are just being themselves or if I'm missing something.
Also found that my temp gauge doesn't work either. Engine does not appear to be overheating and the cooling system appears to be working appropriately. Though I'm not sure how to fix my temp gauge. It is wired up correctly, just not giving me a signal. Wondering if related to the tach not working since they're on the same side of the gauge cluster. My speedometer, fuel gauge, odometer, and trip odometer are all functioning appropriately.
In theory this engine was built with mostly new parts, at least new guts, though I've found a lot of things that didn't quite match the description of the work performed so it's hard to tell what was actually done. The heads are definitely new and when peering down inside the oil fill hole, the internal components appear to be new or very clean.
Any who, that's the latest and I'll be going through it over the next few days in hopes of sorting things out and getting it to run properly.
Thanks!