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Pretty sure we still buy a few from Eaton..??? There are a few hydraulic flat tappet suppliers in the US. Delphi is another large supplier.

Is there an issue with the Lunati lifters you have? There are at least 5-6 different suppliers of flat tappets. Many OEM Lifter suppliers like Eaton and Schaeffler don't sell directly to the consumer.

True, but if you cant change the A/F that equals a Lambda of 1.0, then the "gas calibrated" gauge will ALWAYS assign an A/F of 14.69 to a Lambda reading of 1.0. Methanol, E85, Nartural Gas,,ect will ALL register 14.7 as a stoich if using a "Gas" calibrated Wideband gauge.

The larger the cam is, the tougher it is to maintain a stoich idle A/F(14.7). So don't get your hopes up with that cam. The locked timing sure isn't going to help. So I wouldn't go nuts trying to hit the perfect Stoich ratio at idle. You'll probably find an A/F 13.5:1 makes your combo's idle...

Seems like there's a lot of "let's throw parts at" solutions here. It's all just speculation without real data. Getting the thing on a chassis Dyno would tell you exactly what the Hp curve looks like and where you should be shifting. It would also give you an opportunity to play with timing and...