I've heard a long bed single cab s10 is the correct length and width.
Not without a lot of fabrication.
Early model would probably be 1928 thru 1931 Ford for a direct bolt in.
Try a Ford Ranger pickup. Any F100 frame will be too wide to fit the tires under the fenders. A common swap is an S10 frame.
Ranger
what later frame can you use for a 1954 ford f100
None, the 1952 mounted on a curved, A shaped frame, all later model trucks use a straight, or X shaped frame. Also the frames on later model trucks are approximately 5 inches wider.
Most fuel pumps in 1987 for Ford were on the drivers side frame rail but some were in the gas tanks depends on the model of the vehicle. I know the trucks were on the drivers side frame rail under the cab and so were most cars.
1973-1977.5
on the frame under the driver's door
It is under the car about under the seats in the frame rail.
Under the frame of the truck not the oil pan or exhaust.
It is under the truck on the left side of the frame.