1978 Warlock

Here is a pic of the vin # and I was told the 383 may not be the original motor He also said the engine will start and that the price is negotiable

VIN will not prove it's a Warlock. Nothing in VIN to prove it like a lil Red.

The first 2 pictures in post number 2 pretty much prove it is a Warlock also. If they are original doors for the truck.
As for the motor, 383s stopped in 71 I believe.
Now if the fender or radiator plate is still there get the code from it and run it for the options. The vin number will tell you what engine it came with.

E=318 2bbbl
MY BAD

Serial Number W15BE8J502096
Make Dodge
Model W1 - W150
Body Style 5 - Crew Cab with Utiline box; Compact Extended Body Maxivan (Tradesman)
Gross Vehicle Weight B - 6,001 lbs to 10,000 lbs
Engine E - LA 318-1 V8 2V
Year 1978
Plant J - Tecumseh Road Truck, Canada
Wheelbase 115,131,133,149
Rating 1/2 Ton
Build Number 2096

Neat truck.