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O2 measurement on Methanol with Bosch 4.2 n/a engine

Understanding AFR

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I searched around but wasn't able to find a good answer to my question: I have a 615cui Chevy motor, 13:1 compression, water jackets, naturally aspirated. I use a Haltech Elite 2500 ECU and have the old WB2 wideband controller that is only compatible with Bosch 4.2 O2 sensors. I'm beginning to build the wiring harness and want to get kinks sorted out now rather than later so trying to figure out the answer to the following:

Will the 4.2 be sufficiently precise to measure lambda when driving the BBC on methanol? I'll be mainly driving on race gas but when going to the drag strip it would be nice to get the extra power.

Maybe someone has practical experience, I read different target values for the lambda ranging from 0.6 to 0.8 for n/a and 0.6 would definitely not be in the range for the 4.2.

Thanks for reading and appreciate any advice!

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