[timmy2]

Nice looking car.
The ‘74 will allow the fuel pump to run with ignition on, safety cut off didn’t start until ‘76.
(Unless they re-wired the entire car to install the 3.0, which is doubtful)
Test for spark is the first step. Especially if it fails when hot.
Spread the pins on the fuel pump relay with a razor blade is second.
Then check for a pop off valve in the air box under the air filter that may be open or dislodged.
Many more detailed tests to do if these simple checks don’t find anything.
(Fuel pressure system checks, check for electrical and grounding issues etc)
Do the simple tests first and report back.