Well the main problem I see is that when the 900psi of nitrous hits the propaen (which is theoredicaly under vacume pressure) it will blow it out of the cyl. Causing a super lean Fuel to air mixtue.

Or if I were to pre-mix the propane and nitrouse before the mixer I could get to much combustion and plow the head gasket.

my next problem is how do I add more fuel with to the motor with out a bigger mixer? I plan on using an Impco 100 but this mixer will not flow enough pane for a 50 shot. I would have to run an Impco 200 wich would cause the engine to run rich. Because mixers are self regulating I would have to rig up some kind of high pressure solinoid that would open up at high RPM's and allow a presice mixtue of propane and nitrouse into the manofold at the same time.

So do I spen the 100 hours of trial and error to find this perfict mixture and figure out a pre mix system or do I just say F-it and move on? I'm undecided at this point but only time will tell.