You can get a substantial increase is low end power by removing the OE 750K R16/1 resistor After doing this I can drop it into fifth gear at 35 MPH, and around town fuel consumption improved from high teens to low twenties.

Prior to removing the resistor fifth was unusable below about 45 MPH.

Removing the resistor increases the rate of spark advance with engine revs. It's the equivalent of installing lighter centrifugal springs in sixties vintage distributors.

For emissions testing I short the R16/1 connector (and also plug the vacuum advance hose). This slows the rate of advance, which increases EGT to keep the catalyist hotter. From being on the ragged edge of failure it now passes comfortably, but it won't get out of it's own way below about 2000 revs.

I did a bunch of temperature testing and documented the spark advance maps... easy search, threads stated by me.

Duke