I've a dim memory of a sound clip of the V8 on one of the Stanley Schofield TT albums, ridden by Dickie Dale.
Small sound clip here (origin unknown) -
I saw Dickie Dale ride the Guzzi 8 in the Golden Jubilee 8 lap Senior TT. Dickie rode it home to 4th with it firing on 6 and a half cylinder.
Fantastic era before the ban. Bob Mac on a Gilera, John Surtees MV 2nd, Bob Brown Gilera 3rd.