[decooney]

MCOULTER,

The reason you might have been told its "not frequently done" in an SPF with a 427 BB is because its mostly true. Its more like 1 out of 20 or 1 out of 30 run FEs (390s, 428s), and then 1 out of say 50 run 427 FEs, if even that. This is probabaly more due to FE availability on demand than anything else, but that is starting to change with new aftermarket FE blocks coming out over the last few years. Most SPFs I've seen run the 351/Windsor or 385 series 460+ platform engines because they are regularly available crate engines and more mass produced, and they work well. This combination makes it easier for the dealers to sell the cars when customers are looking for an end-to-end solution, and want a proven solution, quickly.

However, FEs (390, 427, 428) and the new versions of the aluminum Shelby FE or Genesis or Pond blocks will work too. My friend has a Shelby aluminum 427 in his SPF. It fits well and works great with big block power and small block weight. Any of these will work and its been done over and over, successfully by many. Good Luck.