This is NOT true , the starter does not continue cranking when the key is released. You simply have a fused solenoid; no need to pull the fusable link, just accept that the solenoid is bad. Solenoids and relays are exactly the same thing; one is designed for only a few amps of current, the other for hundreds of amps, that's all. The starter relay simply provides current to the solenoid's coil. The 98-2000 400s aren't quite as bad to fix as the earlier models, since there is no EGR plumbing.
You are right. Sorry about that. I must have been confused with one of my other cars, but I could have sworn ...
I have a copy of the owner's manual right near my desk so I looked it up. Page 99 says, "...crank the engine by turning the key to "START". Release it when the engine starts." Pretty simple.
So that's good news for swan55, since it mean the system is not complicated by this feature.
I'll go back and edit my previous post so nobody reads that without finding this correction.