Tri Z adding second boost port?

[1972mercury]

I got a tri z bought it cheap cause the motor was seized and am going to rebuild the engine and was looking at the yahama wrench report and want to do the extra boost port and was wondering how difficult it is or if anybody had theres done by a machine shop

[pcs]

any machine shop that works on 2 stroke engines should not have a problem adding the boost port, search around here, a member here did it himself and had lots of pics of his work.