[6pack] engine question

[Oliver]

Hi, all.

I have a friend with a very nice, very original 75 TR6 that was her 
stepfathers, who bought it new.  i've been under the car, and it still has 
the cardboard tranny tunnel.

anyway, looks like she blew the head gasket - the dipstick comes out with 
multiple flavors . . .

she's had some overheating issues, and we think some of the water passages 
may be blocked.  can you get to them from the top of the engine once the 
head is off?

thanks!