Thanks, Bill for the response and thoughts. Welcome to ClubCobra!
I have definitely solved the linkage problem. The engine tune is another story. I thought that I was getting pretty close to a proper tune on the Weber setup. Last Saturday our local Capital Area Cobra Club took a bunch of our cars to a dyno for a group rate package. Thought it would certainly be great to get a baseline for working from. Total disappointment and embarrassment! The monster only pulled 250 HP on the best of the three pulls.
Eventhough I have smaller jets than most thought it should run, it is running very rich (which does help explain the backfire on decel). Since the engine was built 12 years ago by guys in KY that are no longer there and it was originally bought through Burt Kerns (you remember that thief, right?), I really don't know much about the engine. I am not even sure what the compression ratio is. Right now I am guessing that the ratio is fairly low and that the heads are not flowing very good.
I am thinking about finding a good engine shop that is experienced with FEs and hopefully Webers that can freshen up the engine and improve the performance - maybe new aluminum heads. Do you know anyone that fits this bill? Have you heard of Active Racing Engines outside of Toronto? They are building up a restoration of a 289 from a GT350 and they are going to convert it to Webers. It is being done on Dream Car Garage on Speedvision. Maybe they could help. Any thoughts would be appreciated. Thanks.
Corey Zimmerman