replacing cam bearings?

Now, this is real shade tree; did it on buddy's 400 GTO, 1968 model. Cam and dissy went out on the way home from work ( Jax to Gainesville, Fl)
Pulled the engine. Pulled the cam. Found a pvc pipe that was close fit. Knocked out the front cam bearing, drilled a hole in the pvc, put a nail in it, then proceeded to drive out the rest of the bearings, using the next old bearing as the driver.
Installed the new bearings the same way. Last I heard, after he lost his license over that car, it was still screaming (heard next owner lost his too).