On the Carter strip mechanical pumps, 1/4" NPT is the fitting thread size on the pump's inlet and outlet. This is NOT a restriction if you're running 3/8" fuel line. They are not 1/4" diameter ports on the pump. It's actually larger than 3/8" diameter hose.

A Carter mechanical strip pump (the 8.5 psi version) will feed your motor. I ran one for years on a 440 in my 'cuda that was running 11.40s at 117 mph. I "upgraded" to a Holley blue pump w/ -8 (1/2") fuel line and didn't see any difference in performance. CHIP

Thanks a9sec70cuda, that makes sense!!
Think I'll go with the Carter. It's one thing to make a little noise, but when someone gets in your car and asks if that's the "flux capacitor" making that awful noise (that's my son's smart-alecky buddy!), it's time for a change...

I know Labrat ran a holley mechanical pump in his GTX running low 11's. The carter mechanical is more pump than that.

I ran a stock pump supplemented by a Holley Blue for years. Cruised around running off the stock pump,flipped the electric on for racing. Worked great.

another vote for a mallory pump.

I have two friends who had that new holley pump and it went out,
one froze up completely..I think that new holley is made overseas.

I have a Holley Blue Pump as well. I cut up an old rubber floor mat and used it as an insulator between the pump and the area its mounted too. Quieted it down quite a bit.