I upgraded my Needswings tweaked manifolds to the Needwings/Waldig crossover tweaked manifolds. Easy installation, but I went slow and steady to avoid errors. Car feels stronger and there's a deeper pleasant burble from the engine (oddly enough). I hope to get it dyne tested for A/F ratio and HP in the next couple weeks. In the meantime I'm taking it easy on the throttle. Still, it feels very strong, so I'm hopeful LOL.

Cheers,
Dave