How do i put a 915 tranny in a swing axle beetle

[micberg]

I'm a total beginner thats for sure and i now that there are a lot more qualified gys out there

I have a -66 ruby red beetle with a broken stock tranny that im going to replace, i have now a 1600cc engine in my car but i am going to put in a new type 1 engine in i have started to collect the essential parts based on a Okrasa 84mm crank and H-beams from Scat and a FK-10 camshaft along with 1.4 rockers still waiting for a engine block problably Cb's alucase and the cnc worked oval wedges.

I need a strong box because im going to race the car and not only that im going to drive to the races it can be something about 200-500km distances one way so will definitely need a 5 speed gearbox.

The box is prepayed and is coming to my place in July, as a beginner what have i in front of me? Is it possible to do this or should i sell the box and by a closeratio 4 speed that revs 3.8k with a speed of 90?

I'm sorry to bore you out this question is ask before but i did a search and found nothing a lot interesting but not excatly all that i needed to now, also made this question at shoptalks with no good response.

Thanks
michael