RE: Glow plug ?
Jolly here are some good almost direct replacements ( as memory serves):
Os 46 AX and 50SX, Magnum 46 and 53 XLS, and the TT 46 Pro.
Some other goodies:
Irvine 46 and 53, Enya 50 SS, Super tiger GS 45 and 51, and the MVVS 49.
Mark Shuman
PS: The #8 will be just fine.