If you're going to be rebuilding the engine anyway then stroking it doesn't add much to the total bill. You need new pistons anyway so that is no additional cost. If you need a new crank then you're dead even, if your old crank was still good then you're only out the difference of a new crank vs. rebuilding your old crank. So maybe $300 difference for the extra cubic inches.

Adding the extra inches will lower the torque peak of the engine which is good for a street car. It might not go any faster at the track, but it will give you a nice thump in the back when you jump on it going up a freeway on-ramp.