Its a 1975 HJ kingswood Van, and i think i will keep to carby engine as i like the idea of that better i know the ecomeny will never match EFI engines lol but is there a good driveline combo i can get behind a 253 or 308 such as what gear box and diff? is there a good diff if a stuck with Aussie 4 speed? Whats a resonble amount of money to spend on a donor car? also if i did settle for the 253 in the rebuild process what parts would be worth upgrading to get a wee more power above the stock number.