Pushrods

Want to built a stroker engine and was wondering till what size/stroke engine could i use the stock length pushrods?
Engine i had in mind is a 1955cc engine with stock length con.rods, a size 90.5 pistons,40x35.5 heads ported and polished,
9.1 compression,40mm dells or webers(maybe Ida's in the future or for racing),engle 120 cam and 1:25 rockers.
Can i use the stock length pushrods or do i need to buy the ones that you have to cut to length?
Btw does a 1915 cc need the rods to be cut to if i had the same as above except for the 69mm crank?
Thnx for some tips