Gotcha.
How much heavier is the 6BT over the 2F?
What level of tune to you intend to run with this motor? I've read on the cummins forums that they can put out just about as much power as you want them to. Worried at all about blowing out the axles the first time you step on the gas?
Oh, I don't think the 6BT is more than a few hundred over the 2F----and, likely 200. I believe I remember this from a 6BT wt spec in a svc manual breaking out engine stamp #'s and comparing that with the same for a 2F at some point.
Then again, moo main R----------f'r potent, so Ay, Man.... I coon only conjec-ture at times. If by level of tune you mean "expertise applied to desired performance standard"----well, then this where I reveal my current level of ignorance. My desire tune is "running" Man----she doesn't do me proud as she is except to yell Potential. Too moony R'frs died a dry death from seeing Time sap their Sacred Spirit oot and let stale in. No matter how much torque she has, if it never get to wheel, it all for not. Level of tune is taking the Holset it came with and making sure it is CONNECTED to the right side of the intake and the correct side of the exhaust and let 'er rip.
I'm learning about diesels----and from what I know I'd say I'm not quite ready to leave the hi-chair. Oh, I've thrown some food around here but, Man .... you don't make Trail by beating your proverbial tin-can chest... someday you have to Eat Trail. So, the axle-blowing thing----as you might have read from Cumminscruiser's buildup (
https://forum.ih8mud.com/60-series-wagons/460308-reserected-fj60.html), he's been running his 6BT'd60 for over a decade. What I can say is that one thing are issues I realized and all you guys likely know already is various play areas in your driveline as places where mishap breeds. Slightly loose bolts between txfr case companion flange and mate on drivelines----leads to strong sheer moments when spin and force conspire. So I think having "tight" links down your whole driveline becomes a major concern with a powertrain like the 6BT living long. Oh, and a foot that is light and quick to shift in response to changing trail demands----not much time when that torque wants to overwhelm a little rock wall but the speed your trying to do that simply blows through the limits of things. Aah, by speed I say rotational kind of thing. So I guess that it the real test when such a large power plant meets a chassis----where are all the weak links. Are some in the gearing limits setup by the transfer case? Or in how loose/tight all the pieces are within your driveline? I maybe dumb but it seems to me the axles may never see as much Force as any of the driveline links?
I do know one thing---this is a learning Journey and you'll all benefit from my...
Mistakes!
Passin' the R-------r along....