I don't believe a 1998 Regal, regardless of engine, will have a distributor. It will have an electronic ignition that outperforms any distributor of old.
Distributor Assembly Mounting
yes
crutchfield.com
No. Yes you can
The Enclave. The Buick Enclave has 275 horsepower and the Buick Regal has 195 horsepower. The Buick T-type had a turbo charged V-6 rated at 325 vHorsepower.
how to install dist. on a buick 225 v6
260
160hp
No.
I have a 1995 Skylark and there is no distributor cap.
Wiki says 170hp
Around 150 hp