Did the car have a standard shift or an automatic transmission? Automatic engines were equipped with hydraulic valve lifters. Some car engines also had automatic choke carburetors. That won't prevent the swap, but it does change how a valve adjustment is done. There will also probably be a slight difference in the motor mount setup.

Do you have the original engine for the pickup? If so, it will be pretty simple to swap over the parts that don't match up.

There might also be some slight differences in throttle linkage and a corresponding change in the angle of the exhaust pipe and exhaust manifold outlet.

None of these details will prevent the changeover being made- - - - -just a bit more work involved than a direct swap. Good luck!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!