Although this is an old post, a buddy and I completed BBK Long Tube installment in less than seven hours without dropping the K-member, yesterday. We did jack either side of the motor to accommodate replacing the motor mounts, removed the starter and disconnected the steering link to get the headers in place, then re-installed the starter, (had to use a mirror to view bolt holes and several rachet extensions to reach them, attacking from the front of the motor), and re-connect the steering link. In jacking the motor, had to watch the throttle/clutch cables near the firewall on top as well as coolant lines on the opposite side. Dipstick needed to be cork-screwed back into place, but lined up without difficulty and bolted back into place.
All in all, the installment was fairly easy, just time-consuming.
We had the advantage of installing BBK Long Tubes on my '98 GT - THAT took 12 hours and was a b***h and a half, but we'd learned a lot from that experience to apply on this occasion.
A difference in heads, possibly angle of the heads - for whatever reason, installing headers was NOT as difficult as it may seem.
