Ned I thought you had bought a Lil' M? ...I must be getting old.
Anyway, my MTown block is sitting in Charlotte at my brother-in-law's. He bought it for me thru the team he works for. He is having his buddy do the machine work in his "spare time"...which means, it will take forever and a day, but I'm in no big hurry...lots of work to do on the car...and the team's machine shop is pretty competent...so probably worth the wait...
My concerns with head sealing have to do with boost levels running the TT setup...not because I'm running EFI...