MerCruiser 502 Whipple

A Gen V Mercruiser 502 MPI converted with a HP500 EFI Whipple kit, Lunati cam, heads redone with Ferrea 2.25"/1.88", Mefi 3 controller.
Had some problems with a faulty wide band O2 sensor but after replacing it things started to sort out and the engine runs as good as I want before going to the dyno. Right now sitting and waiting for a slot at the dyno guy, hope to be there soon :)