Just noticed this thread (maybe I smelled the smoke?)
Anyway, a bit more on @Popee 's original question about his motor.
I got my car new from Kirk in 2013, about a year before Popee's build. By then, VS was offering just two 'standard' engines — a stock 1600 and an (almost stock) 1915 'upgrade', which was pretty much a 1600 with larger bore cylinders bolted on (but stock heads, crank, cam, valves, exhaust, EMPI IDF-clone carbs, etc.).
By 2013, the red curly wire on the alternator was gone as was the practice of writing the displacement on the fan shroud.
Roland Rascon was no longer supplying Kirk's 'stock' engines, but would build something custom if the customer requested it. There was a lot of talk (and more than a little evidence) that at that point, the stock engines were Mexicrates.
There are quite a few clues that Popee's engine wasn't one of Kirk's stock engines. Stuff like bolt-on valve covers, extended sump, ceramic headers, electric fuel pump, fan belt tensioner, etc. So that engine was either a custom build supplied by Roland or some other engine builder to Kirk or was installed at a later date by one of the owners. I'd guess the latter, having myself puttered along in the slow lane on the freeway with one of those Mexicrates for a year before giving up.