Stall on a Stock 904 Converter?

Piggy backing in this thread and looking for some PRACTICAL ADVIVE - as don’t want to change many things for a couple of reasons outlined below. Nearly finished the build of my 360 Magnum - very nice build (I think, at least on paper :) - after lots of advice from FAO members) - will post specs below this…..

Here’s my challenge - firstly, I need to establish what stall converter I have in my stock 904 transmission (car is a 1973 Plymouth Scamp running a 318) and if I need to change anything TEMPORARILY’ - making attention to temporarily as am getting a Tremec 5-speed in a few months and a new rear end (currently the shitty 7.25) - so I’m not looking for switch that etc. advice/comments just yet (but I will be). I’m just wondering what it will be like driving it for a few months and if I can get by with the stock/current set-up - are there any cheap mods I can do for the time being without having to go crazy on the cash? Or are there things I MUST do and are unavoidable?