I did some number searching:
312 x second type HK GTS327 engines. These are significantly different engines to the earlier type which were the same basic engine as fitted to CKD Pontiac and Impala here by GMH. The second type GTS327 engine is basically unique. Much more than L34 though.
266 HT-HG GTS350 auto engines, so just higher than L34.
261 HQ GTS 350 manual engines, so just less than L34 (however these are not significantly different to the auto engines (at least the early autos).
What is rarer than the 150 x final spec LJ XU-1 engines is the final spec HG GTS350 manual engines. These were McKinnon made not Tonnawanda like the earlier HT and HG GTS350M engines. There were 450 x HG GTS 350's, of which 141 were auto, leaving 309 manuals. There were significantly more Tonnawanda style HG 350M engines in HG than McKinnon 350M. The actual number of McKinnon HG GTS350M engines is not known but the estimate is around 100. These are almost as different to the earlier engines as a final spec LJ XU-1 is to the engines prior to the 150 x final cars.
I also looked up the time where it appears the L22 130ci red 6 was replaced by the LD6 138HC in exports. The HJ features manual is amended in April 1975 to show the 138 instead of the 130 for export HJ's to NZ, Thailand and also in another power train combo chart for "export excluding Malaysia, NZ, Thailand and SA", so maybe that means Indonesia, Fiji, Hawaii etc (wherever else HJ went to). So this would appear to mean the QA prefixed 130 that was around for export in HQ was in HJ for a while as well.