340 Gets Terrible Gas Mileage

Years ago a friend of mine installled a 2800-3000rpm converter and it killed his low speed fuel economy. It did not lock up around town.

Probably your best course of action would be converting it to a 4-speed.

: D

Beautiful car btw!

I am an NGK man but have had success and failures with all of them. Like a friends brand new set of ngk r plugs that lost 100whp because of a bad plug in #7...new out of the box, installed by me. I was shocked.