I am new to Mack and have questions - please help!

[Mr Black]

I have just bought a 1985 R686 with a 300 E6 and 9 Speed Mack box. I have what are probably stupid questions but will ask them just the same as I am finding this truck to be a different experience. Questions are below - hope you can help.

1. Is there an easy way to tell if it is a 2V or a 4V?
2. If I leave the truck for more than a day or 2, it won't start. So I had a mechanic fix all of the air leaks and valves on Tuesday. However, I went back to the truck today (as I have it in storage until restored) and nothing happens when I turn the key (today is Saturday). I assume it is still leaking from somewhere. How many days should the air last in the starter tank between starts?
3. Until now I have been filling the starter tank from the trailer line of another prime mover but that is not convenient given where it is parked. I am going to buy a compressor to fill the tank as needed. Any idea what the minimum size compressor I can use for this purpose?
4. There is a manual primer on the fuel pump. Should manual priming only be needed if the truck hasn't been started for long periods?
5. I will be raising the cab height using mounts from an Australian Valueliner or Superliner I. One of the shocks on the cab suspension needs replacing. I would like to fix it now but don't want to waste the money if I need different shocks when raising the cab height. I assume I could use the same shocks but just block up the fixing mounts. Does anyone have an opinion on this?

Hope you can help - thanks!!

[blackdog2]

Flat aluminum or stamped steel with 3 bolts steel 2 valve aluminum are 4 valve Ive seen 88 with 2 valves with tip turbine.

[umodelnut]

I can answer the fuel primer question. The hand primer on the injectors should only be used if you take the tank off with the pickup line in it, or if you run out of fuel, or i guess you could if its been sitting.