I know you have this other motor and all, but if you really want performance,
Kennady Engineering (see archive for address) has a kit to install the Suburu
Leg-I-See motor. It has something like 150 hp and 110 lb/feet of torque.

best o' luck

I hate to be a smarty-pants, but just an FYI, 

The Type I and Type III motors (like in this '67) have no "drive pulley"
seals. the little end of the crankshaft is open to the air, and just has a
little oil "slinger".

GMB, Fairfax, VA
Lookin' a '87-'90 Westy
1985 Jetta Turbo Diesel
1976 Transporter (AGAIN?!!)
ex 1976 Transporter
ex 1972 914 2.0
ex 1973 Squareback
ex 1985 GTi
ex 1970 914 1.7
(family) ex 1972 Transporter
(family) ex 1962 Microbus
(family) ex 1958 Karmann Ghia