RE: OS 91 FS Surpass problems
Im pretty sure the cam is right.
With the rockers off, you can push the cam follower away, and make sure the dot is pointing directly up at the pushrods, so it is at the 11 and 5 o colck at TDC.
Besides, at TDC, in the exhaust/intake cycle, both the exhaust and intake valves are equaly open exactly at valve overlap period.