A lot depends on your budget, but I can certainly recommend a '70's 4/4 - very easy to maintain and tinker with, and the lovely Ford 1600 Crossflow engine.

"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10