I am installing a fuel pressure sender on my schrader valve and have a question about the fitting to get. I would use a -4AN female to 1/8"NPT correct? I noticed there is threads inside and out of the valve and most adapters seem to be male AN.
It is threaded on the inside for the valve. You will have to remove that valve so the gauge should work.
there is not alot of room there for the sender...
I personally would use a -4 line and relocate the sender to a better spot.
but if you think there is room... go for it.