I'm using a set of Mellings like these for my roller block 408 build. I bought a used spider for $20
[ame="http://www.ebay.com/itm/Melling-JB2225-Hydraulic-Roller-Lifter-Dodge-318-360-Set-of-16-/251631131162?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a96625a1a&vxp=mtr"]Melling lifters on eBay[/ame]
[ame="http://www.ebay.com/itm/Melling-JB2225-Hydraulic-Roller-Lifter-Dodge-318-360-Set-of-16-/251631131162?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a96625a1a&vxp=mtr"]Melling lifters on eBay[/ame]
