[surfbeast]

For the 98 4.6's like we have you need to move up to the PI heads. The best are the 2001 heads and intake. You need the complete kit, heads,intake,gaskets,etc.. The kit can be purchased for about 1,150.00 complete and will give you 52 rwhp ( 60 hp ). You can buy the ported heads/intake for about 1K more or buy the new billit cams for about $ 700.00. The ported heads can give you up to 85 rwhp ( 100 hp ) . The normal heads and cams would probably give you 65 rwhp?. Anyway there are alot of ways to go without going the blower route. The cost of a blower and all the parts needed to upgrade plus install could go up to the 4 - 5 K range. The head upgrade could cost between 1500 - 2500 depending on install cost.

Hope this helps.