Wild Turkey , I made some of the castng out but others I wasn't so lucky.You might give me some more information if possible .I believe the 2nd number 21355416 should be a 2135416.
212- I can not identify
21355416-GM
2191127-GM
4095246-Chrysler 3.7/225 L6
414699 -?
3876802-GM 4.1/4.6 L6
3820618-GM 215 Pontiac or a 230 GM
3855914-GM / Pontiac

In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .