The SS series is the ultimate street-strip converter this converter works great on NOS or N/A the Yank SS series has you covered. All SS series models are a 9.5 in billet model with a solid billet lock-up clutch. They also come with the following features listed below.  Rated to 650RWHP

One piece roller burnished hub
new torrington bearings
fully furnace brazed pump and impeller
hardened splines
1 free re-stall in first year
3 yr. warranty