408 stroker kits

Try www.campbellenterprises.com. I bought a complete kit to build a stroker 273 CI up to 330 CI. This kit cost $2292 including the cost of the custom pistons. This is a race kit with a forged crank which is why it's fairly expensive. A street kit with a cast crank for a 340-360 buildup to 408 CI should be less expensive. Hope this helps.