1950cc MGB way down on power!

[Billy_Whizzzz]

Got a ‘68 MGB that I bought with a 1950 Oselli engine that has been dry stored for a few years. I’m struggling to get it running well. It has been extensively recommissioned with a new stage 2 head, Weber, and 123 distributor. Sent it in to be set up on the rolling road and is way down on power - 65hp at flywheel and won’t rev beyond 4000. Compression is very good and I know engine is generally strong and in good condition. Carb has been rejetted. It was in the rolling road a few years back before it was put into storage and was showing 101hp at flywheel on twin SUs and standard head. We’ve been through most obvious things. Could for some reason the cam be a tooth out (can’t think how or why…). Anyone any other thoughts? No garage locally seems to be up for going through timing!