I use whatever NAPA has over the counter for sb Chevy (cork). I clean the head with some scotch brite and some brake cleaner, and then I tack the gasket to the cover (but not to the head). Then I just tighten evenly with some hold-downs.
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'69 3/4 ton C20 2wd w/ 350ci/400THM and a wood bed!
'69 3/4 ton Custom 20 2wd w/ ORIGINAL 350ci/4sp Manual and a wood bed (parts beast).
Seattle, WA.
*See pics of my trucks and project at
www.webshots.com!