I have an ID19 block on my Light 15 put in the car sometime in the ‘80’s. My log book shows 1911cc…
I would imagine the change of engine number would not make a big difference as it is not an upgrade to a V8 turbo charged. The HP would be below 2.0ltr.
We may see it as an upgrade due to the shell bearings but performance-wise not so.
My penny worth
Alistair