How can i get a performance engine for a 1975 vw bettle, i'm in east africa, Tanzania?

you really don't need a different engine. you can use the same engine block and upgrade the pistons, piston jugs, cam shaft, valves and the carburetor. I have a 1972 VW engine that I have upgraded and it puts out 320hp. I use all Moroso engine parts and dual Weber 650cfm 3 barrel carburetors. This just an Idea of what I did to mine.