[BusNit]

I haven't picked up the coach yet due to my buyer delaying on picking up their bus from my property. So in preparation of the arrival, I will need to do some preventative maintenance. One of those things is replacing the original fuel lines around the exterior of the engine that are hardened rubber hoses. Is there a source for those or do I just pull them and get them made at a hydraulic hose shop? Anything else I should change out while I am in there for good measure? This coach has 125k miles on it but it's age is more of the determining factor in replacing some of these things. Cheaper for me to do it in my sideyard driveway than on the side of the road waiting on a tow to some unknown shop...

[HoosierDaddy]

Last summer # 316 gave me fits. It wouldn’t rev above 1000 rpm. After performing all the things u would suspect we found that the inside of the fuel line from the tank had deteriorated limiting fuel flow. You might want to install a fuel pressure gauge on the engine. Very helpful when troubleshooting.

[HoosierDaddy]

   

[Tf175]

Fuel filters . Have extras on board . I presume your later model has primary and secondary spin on filters ? Likely a Racor type fuel water separator as well . 
If you change fuel lines you could lose prime , have fuel and a garden sprayer (or other means of pumping fuel into the system ). Change filters one at a time.  Fill new filter with fuel , have it ready . Run engine for a few minutes,  shut down and change filter . Re start , let engine smooth out , shut down and change other filter .
You can slice old filters radially just above the mounting boss to get a look at the filtering material .
That will give you an idea of your fuel condition. 
If coach has been in use and running well you might consider getting it home before performing preventive maintenance. 
When I bought the '86 it had done  a 1300 mile trip , so I took a chance and drove the 600 miles home . Ran fine . 
Good luck!

[MPerry]

I have replaced a couple of fuel lines on my classic. The originals had reusable ends which should go on new hoses just fine. However, according the parts guys you need to use the hose from same manufacturer to ensure the ends fit. In my case I wasn't positive on the original hoses and didn't want problems so I had them make new hoses for me with ends.
My hose ends had what appeared to be stylized S, and that may have been for Stratoflex. In any case I would recommend taking the old ones with you to match the fitting sizes and angles.