My guess is look at what your going to use the Rover for, if your going to go bush I would be inclined to reco the 4 banger and re install it, I heckled over this same drama with mine in the end I got rid of the 3, ended up being stuck with a Holden motor in the replacement anyway, the majority vote on here is go the four over the six anyday. Has anyone given thought to the Starfire 4 which is a holden donk minus 2 cyls, very strong motor the conrods are used in really hot 6s as they dont break, would be an easy fit in and give you plenty of radiator space, I am considering this for my Series 1 80 in.

