Reminds me of the '84 my Mother had, except her's was brown and cream with a not so mighty slanty.

Her truck was CLEAN. But the slant was garbage. The slant ran fine, but run it for any length of time at fwy speed and it would blow freeze plugs out. Cracked block? I never tore it down completely to check it out and being that it had to pass emissions (visual and sniff) I didn't want to deal with swapping engines. Ended up selling it off for cheap because a freeze plug blew out while the buyer was test driving it. Truck went up to Conroe area and I never saw it again.