I been thinking about bulding a 318 or a 360 for my truck right now they is a 318 i would just go with the bigger one b/c bigger is better but i wanted to know if i had to change anything like the tran, comp,wires ext.... and i would like to know want kind of mods i should do to motor andthe trans to make it stronger right now i have plans for a trans cooler, shirft kit, dep tran pan and i already have a tran gauge