Modern 360 question

The modern 360 has a roller cam but is set up for torq, as it is used in pickup trucks. They stop making power at about 5500rpm. Most of the cams you find for the modern 360 are designed for truck engines w/ efi. So you have to do your homework if you want to build one that will turn the rpms like the older 360s. (I went w/ a big hydralic roller and am not real happy with it.) Also the modern 360 is internaly balanced, older 360 externaly balanced. You can use the 904 but you will need a torqconverter for an internaly balanced motor. I used one from a slant 6. Not sure if the 318s are internal or external balance. GOOD LUCK!!