front of the block, bigger diameter. smaller diameter. at rear of the block.
I have re-placed the #4 bearing while the engine was still the Dart.
Fashioned a PVC pipe with a flat washer at the business end and a
piece of wood turned to bearing I.D. size, thru the washer into the PVC pipe.
slid a 5# mallet into the other end handle first, to act as a slide hammer.
put the cam bearing on dry ice for a short time.
worked great.
way TOO cheap to acutely go out and BUY a bearing install tool.