Here's all that you will need if you have all the parts from the 73 small block to swap over:
Timing chain gasket kit with crank seal ($23)...
Fel-Pro Timing Cover Gaskets SFLTCS45284
Piston stop tool ($10)...
Summit Racing® Piston Stops SUM-900189
It will cost you $33 + paint to get it to match correctly... :D
(How's that for an affordable solution????) :popcorn: