Thanks for the help so far... needing more....update on subject issues last to first:
3) Driveline thump: got new propeller shaft center bearing & rubber holder mount. Ran out of time to do it myself so had indy shop do the replacement work (gotta get a lift someday). $269 in labor to prove that I have poor troubleshooting skillz since the bearing and holder mount and flex disks were fine. Still have the speed-related thump.....need to elevate rear wheels, put it in gear, & look & listen without doing a Ferris Buhler stunt. Later
2) Did the first xmission fluid change with 4 quarts Royal Purple Max fluid. Original fluid was a light tan. 3/8 inches of milkshake thick sludge in pan. Only light dusting of metal on the magnet. Shifting immediately better, but still have an over-revving 1-2 shift & bumpy 2-3 shift. Will do another fluid/filter change after solving:
1) Determined likely head / gasket leak. Changed engine oil (needed it) and 1000 miles in the oil still looks clean & no noticeable increase in coolant oil contamination (only visible in res, of course). Engine miss has greatly increased under heavy throttle and cylinder pressures to the point where 80 mph is all she will go. Action time.
Planning on getting a lower mileage used engine and swapping out. On-line shows $500 to $750 range with $200 shipping. Researching to see if that is for the long block only or the entire pulled unit. Feel this is the best path considering the cost and trouble of removing & milling heads. If a head is bad I see $1500 as the parts cost for that alone. Less messy to pull the whole engine/trans than tear down the top. Can then investigate the old one at leisure...
M112 E32 applications listed are:
Do the engines in all these uses have the same brackets, headers, sensor connections, ECUs, oil pans? Is there a cross-reference anywhere? Has anyone else taken this route (other than to pop in a V8)? And WHERE can I buy a workshop manual or CD.
Thanks in advance.