Cobra Make, Engine: ERA 427 SC # 571, 472 Shelby aluminum "stroker " CSX # 299 from Gessford, 48 IDA Weber carburetors from Jim Inglese
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Hello Peter
Check if your Webers have 3 drillings. Mine ran much better afterwards in daily traffic (0 - 3';000 min-1).
If possible mount two Lamda sensors, then you can see what your mixture is doing.
Good luck and much patience
I wrote a couple emails to Jim Inglese yesterday requesting hyd roller cam advice and 48IDA + manifold vertical dimensions. My current 408W setup is a solid roller cam and too radical for decent country backroad driving. The trailer hitching on mountain switchbacks is annoying.
I've always wanted a set of downdrafts and I'm scrapping bottom finding things to do on the car.
So next will be new cam,valve springs,lifters, rods, chain. Once running again I'll dive into the Webers.
Good luck, will be interested to hear what you decide on. Weber's can be touchy on the road, going with a less aggressive cam may help. In a race application they work great, but then again I am never below 4,000 rpms except when going through the paddock to and from the grid.