Phillip from South Africa here. A few tips if you are interested: You can use a 302 (5.0L) crank, with 289 conrods to give a better rod-ratio. Get compression ratio about 10.9:1. Use TFS Twisted Wedge heads from the USA, together with a Competition 280R Roller Cam (about 240 Degrees Duration @0.050" Lift), and get yerself a Victor Junior manifold, modify it to accept injectors, and put a Haltech F9A on the little bugger. Optimized you should have about 420-440 Hp (310-325 kW) on the flywheel, and believe me, it is a very healthy setup(Naturally Aspirated).
Optionally, you can use a BXR Manifold from www.mustangbxr.com, but they are too expensive in my country, as well as GT40 and variants, that is why I use a modified 302 victor junior! (Yeah, I know it is a single plane that works from 3500-8000rpm, but, that is with a carby-with fuel injection it is a much smoother setup-much smoother at idle, even with roller camshaft)
Mail me if you want any additional info.
Hope this helps a little.
Phillip van rensburg