Personal best.
Had to pull the engine out of the Wonderbus to re-torque the heads (due to head on shoulders torqued too loosely resulting in same situation on heads when I put the engine in last time).
Time to pull engine, pull tin, re-torque heads, re-install engine with detour to install dash-mount reverse gear lamp: 5-1/2 hours. Laughably long for most of you I bet. But not bad for my second time, I reckon. Carbs need to be dismounted to get the engine outta the back o' the bus.
Hardest part is getting the engine to go back into place. Either the engine mounts on the mustache bar interfere, or the output shaft on the engine just /does not/ want to slip sensuously into the transmission. Shove. Push. Raise engine try again. Lower engine try again. Woggle from side to side. Pull back and stare at situation. Repeat.
If anyone has a procedure that simplifies this part of the drill, I'd appreciate hearing it.
But one thing's for sure: I never could have done it the first time if it wasn't for the encouragement of everyone on RAMVA. With that under my belt, I had a lot more certainty about this one.