The fuse box on a 1986 Buick Regal is located below the dash near the brake pedal. It prevents circuits in the vehicle from being overloaded.
The Buick Roadmaster was not produced in 1986. They were made from 1991 to 1996.
I have a 1992 regal and it is located under the glove-box behind a piece of black plastic.
Not practical to try to fix a heater core. Replace it with a new one.
YOu can check the inside door panel sticker for the curb weight. SHould be around 3200lbs
The bolt pattern for a 1986 regal is 5x4.75.
The firing oder is 165432 clockwise, and the nunber one plugis on your Driver side
A Chevy 305 produces:130 HP - 250 HP A stock 86 305ci Regal will be the 165 HP or 190 HP version.
Do they have the same engine? If not, then no, it wont work. If they do, make sure they have the same fuel pressure requirment. If the engine and pressure is the same, they should be interchangeable.
It is under the dash on the pass side and requires a bunch of work to get to it. Take it to a garage.
It could be the heater core leaking.
There are four motor mounts on the 1986 Buick Park Ave. There is one motor mount on each corner of the motor. The motor mounts will be on the bottom of the motor.