looking for some help on a 340 build

hey guys, im looking to rebuild the 340 in my dart over the winter and I could use some help. i would love to get an honest 450 hp out of it. I have about 3500 to invest. I was thinking maybe a stroker kit and some eddys but thats most of budget right there, maybe just put some money into port work on the x heads i already have and spend the rest elsewhere, kinda torn any advice appreciated