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most of gt3 cars use >600hp road engines, but letting engines be more powerful means privaters woud need to rebuild it more often making gt3 more expensive and potentially less affordable for teams and am drivers. On topspeed.com I've found this about 2019 R8 lms:
"While this may be the case, the almost unchanged engine will still need servicing every 6,213 racing miles and a full rebuild after 12,426 racing miles."
potentially a single engine could be used for both nurburgring 24H and spa 24H with still many miles yet to go before mandatory rebuild.
The reasonable managment costs is basically the secret of GT3 formula success.
Anyway if GT convergence will happen for real in future, I would be in favour to see same specs but different bop for pro classes and pro-am classes, with the first made somehow more powerful and lighter if possible. It wouldn't be something really new actually, years ago in gt-open GT3 were allowed to run in SGT class along GTE and modified GT1 and had a different bop than gt3 cars running in GTS.
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