Electric pump before or after mechanical

318 +.030
Zero decked
KB167
RPM AG
Eddy 1405 W/ 1” phenolic
Eddy mech fuel pump
Stainless fuel line insulated in the entire engine compartment

I suffer from the warm start issues and when I open good, my fuel pressure gauge shows 0 and the bowls are empty.
I have read on this site about installing lv/lp electric to help with this issue but cannot find it now.
Do I install it before the mechanical or after?

Thanks to you guys for the help!
Before the pump and as close to tank as you can. If your diaphragm fails it is possible for the electric pump to fill the crankcase with fuel. Use it to prime and start, then shut it off and the mechanical pump will pull fuel through the electric pump.
Airtex External Electric Fuel Pumps E8012S