Call, only behind to 78/straight flush, wouldnt expect any fish to check behind a house. Dont see why you or how you can c/f in this spot. If i check I am calling, and I'm betting tbh.
Pre is fine, i would be opening tightish to a very big size (the max i can get away with) this deep in position vs a deepstacked weak opponent.
Honeybadger made a post about nonstandard betsizing, and preflop here is a spot where we can open big for value, we just need to find our opponents inflection point to call. You will find this fairly easy and be able to adjust. For example, in my local game depending on lineup and stacksizes I could quite easily be opening to 5-20 as an open raise at £1/2, I even open to £4 when the game is very shorthanded and the blinds are poor.
I had a small ahah moment in a live £.5/1 game when i was slightly tilted. I opened to £12 utg with AJo and got 9 callers. Don't be afraid to experiment here, preflop is an extremely important street and one we play the most so making good decisions here is important.
We don't miss out when we find out the target folds to an open of £20 but calls £18 everytime instead of our usual 3-4bb open. This becomes important especially when we can extrapolate the extra post, ie increasing the pot early by a small % can make a vast difference to later on. If we go hu in a £40 pot and 1/2 pot every street we put in £140 total (20+40+80)/ When its £24 we go 12/24/48 putting in £84. £16 pre equals 56 one a later street. Imagine now when we go for pot on every street with AK on the K72r on vs the fish

This is a bit of a tangent but should be useful.