Multi disc clutch Transmission ????

[firechief5215]

My truck is the early 28 with the left hand e brake, It does not a date on the fire wall my engine number is *A30592* I believe it is suppose to have the multi disc clutch. I was doing some repairs and noticed that the clutch cover had been modified. It has about a 1" tab welded to it. Knowing that was not correct I posted a add on here and a member sent me a very nice original cover for the multi disc clutch. As I compare the two cover I realize that the original cover was correct for the multi disc clutch and someone added to it .I can only think someone has changed the transmission at some point, probably before the 70,s I guess what I am asking is how can I confirm that this transmission is not the original multi disc clutch/transmission. with the left hand e brake im sure there had to be some modification done. Thanks Billy