Mark IVB Long Head Headshell ?

Friend of mine wanted to sell his Caliber 50 head shell for reasonable price, and I thought it would be good idea to buy it because I expect it will fit into my Mark IVB Long body head or not

I wanted to know what's the Width Length and Height for Mark IVB Long head dimension. I do have the combo version but I wanted to make sure that it would fit. I tried to look around the information it seems I got different measurement.

My concern would be the reverb tank and the fan.

What would you think folks ? Any comments or help would me much appreciated

Cheers
Andrew

Just take your MkIV over to your friends house and see if it'll fit.
Measure your reverb tank and compare to the cut out in the 50 Caliber head shell to see if it'll fit.
Easy stuff....