Here's an idea..................
Take the engine, wire harness, & puter, along with trans & t/case out of your project truck, install all that into your daily driver.
Convert your project truck to a 4.0.
Of course, it would be less expensive to just replace your 2.9 with a good running engine from a boneyard.
There's an 88 B2 XLS at work that got smashed in the left front pretty good & it starts up & runs good. I'll check tomorrow & see what they want for the whole thing. It has 98K original miles. If it's cheap enough, you could use the 2.9 out of it & part out the rest maybe to recoup some of the cash.