Low budget............
Haul every thing to the car wash, blast all the crud off there, run a bottoming tap in all the bolt holes, clean/chase all the threads, rub the gasket surfaces with a large oil stone to knock off any burrs, scrub the chambers in the heads with a wire wheel, carefully pour some solvent down the ports, if nothing leaks buy into the chamber there is no reason to go further on the heads, they seal. 800 grit wet/dry, a piece of leather lace, wd-40, polish the crank if you can't catch a finger nail, if you can source another crank or turn it, which ever is cheaper. Berryman products has a great dip parts cleaner, soak a piston in it for about 15 minutes, garden hose it off, should be pretty clean, if not, another 15 minutes, broken ring to clean the grooves. After the pistons, soak all the hardware. Soak the oil pump pick up. Blue berry cylinder condition, 30 seconds a hole.
Search CL/here/ anywhere you can think of for a used take out cam and lifters if your looking to "enhance it" a little.