The Predator Series 301cc is a smallest displacement of the "Big Block" family similar to the 390/420. Some refer to it as the Medium Block. The 301 is growing in popularity due to its power and torque being a balance between speed and comfort. While it is heavier than a hopped up 212 the block is much more durable especially comparing similar power output. This is also great for heavier drivers that was more low end torque for faster acceleration and hill climbing power.