Mikuni jetting questions.
 

Hey I know that this may have been beaten to death but I can't find what I'm looking for and I'm new to forums in general.

This summer I bought a 1983 RX7 GS but it has a few upgrades from a GSL or SE. The engine is most likely but I cannot verify, from a GSL or SE 13b. It has been converted to carburetor and I have no idea if it has been ported. Right now it has a mikuni side draft phh44 and it is running lean, jetted using 12a specs. I was wondering if anyone had a jetting chart for the 13b na? I would love to get the car running right and hopefully not with spending too much money. I want both car and girlfriend happy. And buying a new carb from RB won't do the latter.
. Thanks guys any info would be appreciated.
ps carb is off, I will be ordering new gaskets and jets/ venturi if possible.