green
Yes I have a 1990 with a 454 from the factory...
mounts for 454,poss flywheel,computer for 454
7.9 to 1
Inside the distributor.
set er on and find out lol
255hp@4000rpm
on my 1990 Allegro 454 engine it is located on the passenger side main frame rail just behind the electric steps.
check all vacuum lines for leaks
Stock they had 230 hp with 385 ft pounds.
Yes it is fuel injection. It is called a TBI / Throttle body injection.
It is mounted under the drivers side of the truck up in the frame rail.
The bolt pattern for the 1990 Chevy 454 SS is 5x5 inches (or 5x127 mm). This means there are five lug nut holes, and the diameter of the circle formed by the centers of these holes is 5 inches. Additionally, the wheel stud thread size is typically 1/2"-20.