Slant 6--------My partner John Keeling had a 1969 Ford F150 with FE390 and 3 dueces-------He put one of my engines in it that was a Holmon-Moody Marine 427 that we stroked with a 428 crank-after the Nixon era gas crunch, he removed it because driving distance to LAX where he worked for TWA was exessive for commuting so he put a Mopar slant six in it for better milage-------after he passed from cancer, his wife sold the 427 and lots of other stuff for $200 for everything in the garage-----