how much HP

[ClassicMustang]

I happen to agree with most of what I've read on these posts. When referring to HP, Carroll has said, "enough is never enough". That's why we decided to do something that has never been done before. Our company, in partnership with Sean Hyland Motorsport in Woodstock, Ontario, is installing a 5.4 L modular GT500, aluminum block 1,000 HP engine in a CSX 4000 Cobra. Yes, that's right, 1,000 HP running on E85 pump gas, mated with a TKO600. You can see it this November at the Sean Hyland Motorsport booth at SEMA. (You read it here first.) I'm a Cobra dealer in the US. Over the last year, we've been using Shelby aluminum FE blocks and SHM's services with great success. Sean builds an awesome motor using the best components (T&D rocker assemblies, JE pistons, Tilton starters, etc.) Our collective experience tells us that if you do it right the first time, using the best possible components, the quality of your phone conversations with customers improves greatly. Instead of receiving calls with complaints about fluid leaks or funny noises, you get to hear how much fun they are having with their Shelby, SPF MK III, GT40 or Datona Coupe. Frankly, those are the calls we live for. I also agree a TKO600 is a good choice for a Cobra. .82 is my preferred 5th gear OD ratio for all around performance. A .64 ratio is good for fuel economy, but at 70 mph and 2,000 RPM, torque is pretty limited, even with a big block. For the record, I've been a Shelby Cobra dealer for years, from the previous regime to the current. It's been a wild ride. My office chair has seat belts.