Dohc heads are way too big.
This is an LS v8 pic taken from the gear box end obviously.
Push rod actuated cams may be a little agricultural, but they do make for a very compact cylinder head.(runs off a single cam in the v)
Heads being fine for width in the omega engine bay. Main issue is the manifolds exiting, and the widest part being the spark plug leads/caps.
Afaict its an extremely compact, light, powerful, and reliable engine. Comparatively speaking.
No leaking sumps or cam cover gaskets. Coil pacs last longer. Longer service intervals. Only issue is getting it all in. And self control on the loud pedal once it is
It looked like they may have trouble shutting the bonnet on the first video. A minor issue.
The one pictured is an ls3 iirc(?)
Power goes up with the ls* number
Early ls1 as in the one gm planned for the omega was about 320 iirc?
Ls2 a fair bit more
Ls3 over 400bhp.
I'm sure 2woody will have more accurate figures, but its not really a problem to get 400 out of 1-3 with basic tuning naturally aspirated. Super charging 500hp ish.
Robsys monaro puts put 500 iirc, with a sooohoooHOOOOper charger and monkish mapping. Which runs better with a more manly fuel pump.