I saw your earlier post, and thought about it for a while.
I could not think why a
HH120 which "points up" would be any different than an
HH90 which "points down". The angle of the shaft wont make any difference, as they are both in the same plane when installed.
I've installed HH120, HH90 and SM312D motors, although on Fortec dishes which are not "an old BEV" system. The only issues I've read with motors is the Wineguard mounts are fussy, but only in the mount that interferes with attachment, not the way the shaft "points".
I'd be very suspect of installing an HH90 in strong wind area that took out a HH120 motor.
Not to be critical of your posts, but the stuff that
Sadoun sells works with the stuff he sells.
Maybe if you take some digital pictures of your setup, attachment and troubles we can offer some suggestions. In the years I've been here I don't know what a "old BEV" dish even looks like.
Good luck and hope your install works out.