Your stock pedals should be fine, just remove the clutch pedal. However, you might take a look at using the booster and master cylinder from the '78 if you do the crossmember swap. If you don't go with the swap, the stock rear will be fine behind that V8. In fact, it's actually a stronger rear than what is in the '78 (8.875" ring gear in the '65 vs a 8.5" gear in the '78). Even if you do go ahead with the crossmember swap, the axle shafts from the later rear can be used in the older housing by having the cut down to matching length, then having the C clip grooves recut. Than all you would need to do is use the later style drums to get the matching bolt pattern.
