Paul Lennemann wrote: > > Were the factory 4bbl. engines higher compression and therefore needing > a colder plug? If so just switching from 2 bbl to 4 bbl you might not > want to use the recommended plug for the factory 4 bbl engine. > > Paul L. > '63 Sport Fury > 440/727 ===================================================================== I actually don't think the compression was different. The HP increase was only from 305 to 330 on the 383's in '64 I know. My folks had the 2bl and I had the 4bl and their station wagon would make me pedal! Rich Kinsley '64 Dodge Polara 4dr 318poly w/goodies ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.