Nothing wrong with a JC pump.
Its just not a split bowl.
You already have a diverter on it.
G bowl will fit right on. (Split bowl)
Intakes are virtually identical to the newer versions.
Same with suction housing.
Impeller to wear ring clearances will make a huge difference.
Loaders are available.
My JC pump has both a loader and a ride plate and shoe. Diverter too.
Yes there is better set-ups, but you have a solid foundation.
Dan'l
