904 Valve body decision

I’ve dug through some other posts about this and some have kind of an open ended answer. I’m going to using a B&M promatic 2 instead of the column shift and I’m wanting a manual valve body, so I’ll be going with a TransGo tf 3 kit to use in my current valve body while I save up for a trans rebuild and full manual valve body . I don’t want to deal with a TV cable and I know I can just tie the lever back fully and that’ll keep the pressure high all the time. For a weekend cruiser, at this time, should I be worried about the high pressure or will I be alright? This is if my car will be driving before the end of fall.