I strongly encourage you to look at the 289 class cars. The engine in my Windsor based 427 always felt like it wanted to run at higher RPMs that was compatible with street driving, the result was that I typically drove in 3rd (sometimes 4th) to keep the RPMs up a little to keep the engine from feeling like it was bogged down. The 427 are bred for the track and thrive on high RPMs at WOT for sustained periods of time. The 289 engine is a much better match. And remember, it was the 289 cars that won most of the races and prizes.
From your technical skill set you don't want a new kit nor do you want a finished roller. Even the roller requires you to install the power train and that will take some familiarity with engines and transmissions after the fact, no matter who installs it. These cars don't have a 3 year / 36000 mile warranty. Look for a completed and sorted finished car.
www.cobracountry.com is a place to start. Sometimes here too (in the sale section).