Yeah, I didn't understand that either.
I think Rob is alluding to the fact that the single cam 18R isn’t exactly a powerful engine. I think we are talking sub-100hp (just). In comparison, the 2.0L 18RG twin cam is comparable performance-wise when standard to an L24, and can be tuned and upgraded into the realms of 180-200HP. That’s what I’m planning - ported, polished 18RG head, bigger cams, 44-45mm twin DCOE-style carbs or ITBs, sorted exhaust, etc. The engine blocks, sumps and cranks are the same - it’s a matter of moving the dipstick, and organising around the RG’s format and extra/different bolt-on parts.
But that won’t be happening for a while yet, although I’m already starting to grab parts. I can build the R into an RG, although I’d undoubtedly favour grabbing a full 18RG should one pop up somewhere. Just easier and means the swap over could be done without immobilising the car for weeks.
But more importantly than go - I’m already wheel shopping. 14” Wats are the favourite but being tempted by the idea of some Star Sharks...