3/8” mechanical pump question

Professor Fate said
Different measurements, to a degree.
A 1/4" NPT Pipe/fitting has about a 5/16" passage; a 3/8" barb fitting, on the other hand, only has about 1/4".
NPT, hose, flares, and lines are all measured differently. Makes piecing things together a convoluted mess sometimes... :)

Yup! Where high flow resistance is a concern I will check the inside diameter and ease or chamfer any internal steps.

Syleng1 said
Does anyone know of a factory appearance looking mechanical fuel pump but with 3/8” inlet and outlet? I’m not looking for high flow or anything crazy. Mopar small block.

I converted a car to 3/8” from tank pick up all the way forward to carb 3/8”… because I could. I had the s/s 3/8” line and it kinda snow balled from there. Now I need a factory style pump that looks factory but is 3/8”

okay- go….

How stock looking?
The Holley '110' 'Keith Dorton' will work - that's what I'm using on a LA with later passenger side water pump.
The 6 valve mechanical pumps I tried from MP and Edlebrock do not fit driver side water pump LA engines without mods.
The Edelbrock linked above may be smaller.
M6902 used to be OK in terms of fit a pump pressure. M6270 the pressure was too high for use without a regulator. Ryan Brown confirmed that by actually testing one for me.

As far as T/A and AAR passenger car models go, so far not seeing any documentation.
Would think such a change would show up in the TSBs if not in the FSM and parts books at the start of the year.
The 1970 Hamtramck Registry - 1970 T/A Challenger / AAR Cuda TSBs