Hello My restorer,s guide calls for a # 757 on the trans pad on the right side, for 340. # 825 for 383 . the only #,s i find on the pad are pp8333932 2b408157 and is is (1)57 9 71. on housing c99129h. I just want to know if this 4 speed is for a 340 and that thelow gear would be 2.47:1 thanks Terry. ps what are these tranny,s worth.