1991mj

I'm looking to replace the 2 rubber fuel lines coming off the fuel pump to the steel lines then the 2 little rubber pieces on either side of my fuel filter. I bought rubber fuel injection hose that's sae 30r14t2, and on napas website it says that the working psi of the line is 225psi... will this fuel injection hose work for me under here or do I need to find sae 30r9?

I was trying to convert my 91 comanche to r-134a today I replaced all the o rings, dryer, expansion valve and got all the old oil out of it and had it on a vacuum for awhile, then I filled it with r 134a and it took a long time to fill and while it was charging it would blow at like 60 degrees out of the vents for like a minute then stop and blow like 80 degrees for alittle. Then when i disconnected the machine it would only blow warm. The compressor kicks on and so does the cooling fan, the system called for 2.38lbs and I put 1.90 lbs should I have put more in? Also since it took so long to fill did I have the service valves on the lines coming out of the compressor in the wrong position? I saw some picture that said they should be at the "mid position" for filling and such but I'm not entirely sure how many turns it takes to get to that position.... any help would be appreciated sorry for the long post