i recently gota 66 short/fleet dropped in my lap for almost nothing, BUT!, the bed is from a 60 model....are the cross sill's different? or am i missing something. Also, theres an 'extra' crossmember under the bellhousing of the tranny, way up front.?, did i buy a 66 or a 60? thanks yall and greetings from BFE. g.t.