I know you said compressed air and while no, it's not worth the hassel, do not - I repeat do not use 100% oxygen if you plan on keeping your motor intact.

 

we have a compressor that would be up to the task. lol but its a bit heavy and is built into a trailer. Its a detroit diesel with i think one cylinder used to compress air. Supposed to hold 150 psi on a wide open 2 inch pipe.

probly not worth it

 

If you out an 800 gallon steel air tank in the back of the truck you might have enough air to do somthin