DID 1959 230 H.P. BASE ENGINE DISTRIBUTOR HAVE A HEXAGONAL VACUUM ADVANCE OR SMOOTH? WAS THE GITS OILER ON A CURVED TUBE LIKE THE EARLIER YEARS OR FLUSH MOUNTED TO THE BASE? ALSO, I FOUND A 1110920 WITH HEX ADVANCE AND CURVED GITS TUBE WHICH APPEARS WITH AN ORIGINAL CODE OF 8 G 9 WHICH TRANSLATES TO JULY 9,1958. IS THIS CORVETTE OR PASSENGER CAR?