Thanks Mitch, How would I tell if it has a balance shaft or not? Are you referring to the harmonic balancer? Would it be possible to add one later? My primary purpose is mainly daily drive with some general purpose hauling and maybe towing my parents stranded vehicle with a U-Haul dolly.
Todd Smith -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mitch Haley It is basically 2/3 of the 6BT that Dodge used to use. (like a 602 is 5/6 of a 603) The desireable versions have inline pumps and balance shafts. The inline 6 is naturally balanced, but the four without the shaft is reputed to be shaky. It shouldn't be any harder to build a 250hp 4BT than a 400HP 6BT if you want to go that route. (but keep in mind that the F150 frame isn't as strong as the F250, and it is possible to twist it with enough torque and low gearing)
