2.5 truck lift pump questions

Everybody always says regulator but I never here any specs on tying them in to the fuel system. Like what type of fitting are you using in place of the OFV(its real tight in there). What size line are you running is the stock 5/16 line best? What about the injector return line? T this in before or after the regulator go directly to the regulator.

Pull the spring out of the stock ORF and reuse the rest of it.

3/8" line is what I'm running for both returns
 
My ADII 165 never kept up like i needed it to even on my 12mm pump and a proper OFV, I went to a gear drive waterman style with Haisley high speed checks on the return and haven't looked back. My $.02
 
Can you run the speedy check with something like an a1000? I would love to use something mechanical but I can't find something that will last and pull from a sump
 
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