-8 an female to 1/8 npt female, Lots of googling and havent been able to find one

That would be a unique combo (1/2 to 1/8 npt)
Suggest 2 possibilities
AN-8 Cap then drill and tap to 1/8 NPT (may have to do some regrinding of the NPT to make it fit
AN-8 F to 3/8 NPT M to 3/8 NPT F to 1/8 NPT F

What are you trying to do?
They do make AN-8 M to 1/8 NPT to AN-8 F

I have the usual little mech gauge stuck in the front port, I want to mount a sender for a pressure gauge on the dash at the far end where the cap is.(yellow circle)

Send me the #8 cap and I will drill & tap it for you.

ps- make sure your gauge won't fatigue and start leaking. I don't like mechanical gauges mounted on the engine or in the engine compartment. It's a personal thing.

You can move the frt T that is drilled/tapped for 1/8Npt to the rear.

Edit in: Ooops. Re-read what you typed. You can get that T with a drilled/tapped 1/8"hole like the frt one,or you can drill/tap it yourself, or have someone like Mark at BAM do it as he graciously offered.

If you get the fitting from BAM it will be right. Do agree, don't like fuel mechanical gauges feed by tubing to a gauge

Can also remove your current cap and install one of these and reinstall cap

https://www.motamec.com/motamec-an-j...y-adapter.html

Link is British but they make them here as well

Here you go, replace the T with a 90,so even better,this way you can lose that cap.

https://www.summitracing.com/parts/a...2273/overview/

I hope you are using an electric sender and gauge and not running a poly line to mechanical gauge in the dash.