9:1 318 in an ‘87 4X4 SWB 4.10, NP435, one ton axles, custom drive lines, 35X13.50s. It had headers, performer rpm, and 750 Edelbrock. It ran a lot better than it should have. Comp tech support recommended that cam for that rig after he told them it would be used for hard mudding. I would have gone smaller, but it made good use of the mid range in the swampy stuff.
