My 88 5.0 four speed automatic has crank no start. It ran great until I had the transmission replaced. No it won’t start. And suggestions. Please help

 

Check all wiring connections that were disconnected for the transmission replacement. You had to remove the starter to get the transmission out, I would check there first.
There's also any ground straps especially if they were on the bellhouse bolts.

What happens when you try to start the vehicle?