Not Ranked
I've got a Mass-Flo unit on my big block and it runs fine but the learning curve on the A9L is brutally steep if you're not experienced with it. Tuning for max power is pretty straight forward but when you get into the driveability realm it gets really complicated. Finding someone who understands the A9L program can be a challenge. A lot of people will tell you they can tune it but beyond the max power tuners the pool of tuners gets pretty shallow.
You might get a hold of Mass-Flo and find out if their new ProM ECU is compatible with the setup you've got and if it would be reasonable price wise to change over.
DonC
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