67 cuda 340 engine swap - thoughts

I am getting ready to put the 340 in my cuda, but have come to a junction. Not a big deal but will require some thought. The engine is a 69 for a 70 model year the timing cover has left side timing marks and I have a new fluid balancer for the same.
The 67 273 has the timing marks on the right hand side also the water pumps are different in how the bottom hose exits. I do not "want" to buy another new radiator. I guess what I want to know if I go with the older style water pump on the 340 timing cover will I encounter and fitment issues? And will I be able to see the timing marks, not a big deal (hydraulic cam)but one to think about nonetheless.
Second I would like to convert to power steering. I have a early 70's box, pump, brackets, pulleys and a column for a 67 w/ps. Will I encounter any pump mounting and pulley issues.
Are these real concerns OR am I being too OCD about this and just need to go for it?!