The timing chain is in a totally different location than anywhere the mech will be going to fix the intake gaskets...he'd have to take the harmonic balancer and the front cover off; I'd guess he'd charge you for another 3 or 4 hours' labor at least.
I say wait a few months...you'll get bit by the mod bug, decide to cam the motor, and THEN you can swap the timing set
(P.*., what part of DE are you from?)
(P.P.*., I think you meant to link a thread, but I see no link)
2004 Buick Lesabre Limited, Gran Touring; Bone Stock
1998 Buick Lesabre Limited, Gran Touring; Mods: Poly sway bushings/endlinks, Tru-Cool trans cooler, Thrasher shift kit (med), PLIM, front PEM; Mods in progress: Alot of stuff, but slowly...