The cheapest readily available stroker piston is the KB356 at $420 a set and you have to pay a machine shop to mill the dome off or it will hit a magnum head. Count on at least $100 there.
http://www.summitracing.com/parts/uem-kb356-030http://www.summitracing.com/parts/uem-kb107-030Stroker...
Pistons $420
Mill piston $100 probably more
Crank $350
$870
Not stroker...
Pistons $266
Crank $150
$416
And that is asuming the 360 crank needs balanced, the KB107 is about the same weight as a 5.9 magnum piston, in a low RPM motor you would probably be wasting your money. Without balancing the 360 crank it would be even bigger difference. Also with MPG as a consideration the smaller engine wins and the flat top piston wins.
PS I have used stock rods in 4 inch strokers and there is a lot of grinding, if you don't/can't do it yourself you have to pay a machine shop to clearance your block.
