Why?
Is the old one tired?
Yup, built in 1969 and put through who knows how much more torture than the 10 years I subjected it too, the old girl started getting a head gasket leak where a lot of water was finding its way into the oil. Not a good situation. It still runs, but I decided to tear down my spare 1967 225 v6 from a friends Jeepster, and get it ready to go in.
The Jeepster engine only had about 70K on it. The bores still looked good so it is just getting a ball-hone, re-ring, new seals, and new bearings on the bottom ends. I am having the heads tanked and rebuilt with hardened seats and valve seals on both stems. The only real hot rod modification is going to be a comp 260 cam kit, all metal timing chain, and Comp valve springs. When I swap the engines I think I will also redo the cooling system with a better radiator, fan, and maybe the new TA performance super fancy water pump. I will be keeping my HEI conversion and autolite/motorcraft 2100 carb conversion too.