That's a pretty similar setup to the one I'm running ( in terms of drivers and motors ) they're not a perfect match but they're probably close enough. The A4988 can do 1A without a heatsink, up to 2A with, your motor is rated for 1.7A so with an additional heatsink that should be OK but you will have to watch the motor and driver temperature as the driver is capable of delivering enough current to harm the motor if you turn it up all the way.
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