.I recently drug a 69 Mustang Mach 1 with 80,000 orig miles from thirty years of inside storage..It was in Cailfornia which helped...Weather wise anyway...The 351's gaskets survived Ok..Depends on where and how it was stored .etc..etc..Just putting the final touches on a 64 Chev pickup with a 230 inline..A stock three on the tree run around goffer with 83,000 orig..It was stored outide for ten years and the engine has no leaks nor does it smoke.. Even after a severe shake down cruise..Did replace the rocker and side cover gskts though..The brakes didn't fare so well.....Next!!!....Woulda greased the monos but there ain't none...