need original 4spd. bellhousing to block bolts for a 69 351w (gt350), they are 5/8 head solid head with no marking on the head...2 1/4 to 2 1/2 long(under head) with shank under the head followed by course threads...i believe used 67-69 at least, need 4 original bolts...thx keith 318-393-1502