1995 Mercury Marquis Lincoln 4.6 engine swap

Electrical problem
1995 Mercury Marquis V8 Two Wheel Drive Automatic

I have a grand marquis I ran up almost 300,000 mi on, God bless it the rings gave out. I wasn't going to fix it but I picked up a 4.6l engine that came out of a 93-94 Lincoln for $200. Well the engine is replaced, all hooked up and plugged in. The problem is the engine turns, gets good compression, but won't start. The only clue seems to be the 50A fuse (#9) under the hood keeps popping when I crank it. I 'v rung it out for a short but can't find anything. It ran before the engine swap it just spit oil into the upper cylinders. I suspect the Lincoln wire harness and chassis wiring has something incomparable, my old harness was swiped by the junk scraper while I was at work. If something can be rerouted or changed that would be great but I don't have that kind of detailed wiring info, just the little from a Hayes Manual. So I'm looking to the pros because I mechanically work on industrial motors, controls, generators, ect. For a living. I work on cars when I have to.