regular cars and trucks with the 5.0L got 190 LPH pumps, GT's got the 240 LPH and the upgrade is the 255 LPH. They all run on 30-39 PSI so your good there. It should start and run fine if you have at least 30 PSI with 190 LPH..

As far as the canister, you can plumb it to an old vac solenoid. Some car from the 80's is probably a good source. They just open at cruise using the vac signal. It's how the canisters used to work before electronics took over