Here's a couple of shots from my phone on an altered V8 HEI to use on a 4 or the 90 degreee V6 could be changed the same way. The housing is shortened and a sleeve placed over the reamainder to match the 4/6 cyl. distributor mount and the 4/6 cyl. gear installed farther up the distributor shaftr to line up with the cam.
'45 Ford PU 66 Valiant wagon, leaning tower of power. 79 Chevy C10 w/250 02 PT Cruiser Convertable