Right is; 2808900(5-1-69).Left is;2843992-1(I can make out a 5, but not much of anything else. Not even visible in photo). Dusted soap stone across numbers to read. Both off '69 R/R 383, 4spd. No cracks that I can see. Heat riser moves. Was going to use them on a '62 Newport project, but not...