this is the answer i have found on the net. seems like a pretty easy and cheap upgrade to be able to run at the higher rpm's
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If you want to go faster rpm, then get the GM 990 performance module that is good to 9900 rpm for around $50.
when i was looking to put HEI in my dart ( bought the stuff just haven't done it yet) i found that not only does it eliminate the ballast and ecu but i could eliminate 6 wires under the hood. :) .
