i just did a 300e head gasket..
go to auto zone and buy there 9 dollar metric tape
set... and chase the threads...

you wont believe the gunk...

and if this is the first rebuild forget about the head bolts..
they will work fine... you could measure and make sure there not to
long but just reuse them and dont worry..

also dot worry about your injectors... the 300e is notorious
for the head gasket... that is your real problem... send your head
off and have the valve guides and seals replaceds... and have it
cleaned and made flat....

the biggest problem you will encounter is the front plastic timing guide..
only 10 bucks but if you break the old one your work doubles...

think about your distributor and spark plug wires... but remember there
200 bucks... i found a bad spark plug wire and went to the junk yard
and got one for free...