Does any know the part number for the egr valve on a 1987 olds 442 with a 307 vin 9. Can’t find the part or part number anywhere can find one fir the vin y all day long. I know standard has the egr631 and it says it will work for the caddy equipped with the olds 307 Vin 9 but only works on the 87 442 that has the vin y. Any help would be much appreciated