I've got a T150 which is out to 830cc and uses T120 pistons. I need three, but which make to go for? I've been looking at Nural, JCC and LF Harris (JCC in a Harris box?). Has anyone got anything good or bad to say about there makes, or alternative suggestions please?

1971 BSA A65 Lightning "Bitsa"
1966 BSA A65 "Beezuki" with GT550 two-stroke engine
1974 Triumph T150 830cc
1975 Suzuki GT550
1975 Laverda 1000 3C
1986 Yamaha SRX 600 X 2