83 last year for the flat tappet, also has old firing order. also least amount of horse power. is a tough motor, but hard on fuel. Heads are junk J U N K junk
small oil driveshaft, and it will twist off if you over rev it
Roller cam starts in 84. EFI in trucks 5.0 starts in 85 5.8 in 87 pickups, 89 vans
My suggestion , find a 95'97 1/2 sploder, yank the 5.0, stick it in there, put the smog on it to appear to work, and have some fun
The 95 sploder is a gt40 right out of the box. if you get one for a manual trans, you can run the AOD, which is the better trans, you just have to adjust the tv cable, and it will do what you need it to do without a stand alone controller.
I can help with making the stock motor better, but it's only a matter of time before it burns a valve, or cracks a valve seat. Did I mention the smog heads on there are JUNK?