I have recently purchased an early (1971) 128 1100 sedan. The car has the engine removed. The PO provided the original 1100 block/head and all parts, along with a rebuilt 1300 block (Stamped "138 1"), which appears to be a later 1300 block from a Strada/Ritmo or X1/9. The car has the original 4 speed 1100 transmission. So since I will be putting this thing back together, with added power in mind, what would you suggest I do to get the best "bang for the buck" without spending too much? How about a 1.5 X1/9 engine? (I am in the USA, no Ritmo's here) I don't need a 5 speed. Would a 1.5 work on the original 1100 trans? Or maybe just stick with the 1300 block and do some head work and cam/intake/carb/exhaust work? How about using the X 1/9 Fuel injection? Sorry for all the questions, just trying to get started in the right direction here. I'm not looking to race the car, but building something around 100hp using off-the-shelf parts would be nice. I will post pictures of the car at some point.