[aumoore]

In general a small block will be less maintaince than a big block. It will run cooler, tear up less parts(clutches, rear ends) and cost less to build. The FE series may be the creme of the crop but they are a older design and the valve train is more prone to breakage plus there are not to many people who can properly set one up. If you really want a big block consider a 429/460 based motor which is a more modern motor than the FE and produces over 500HP with ease.