Typically they are longer. But every motor is different so the safest thing to do is use a pushrod length checker. It's only $15.00 dollars or so and will save you in the long run. They can be bought from Summit.
It's worth noting that a few people on these boards use the stock length pushrod with 1.7's...
I just use stock pushrod length on all my 1.7's - they always tighten down in 3/4 turn with proper preload on the lifters with no shims so far.... currently one is on a stock cam and my other is E303 with crane roller lifters and springs