Thanks for contacting us. Our sympathies on the ping of your father. If you notice, the shakers sat slightly differently on Olds powered cars versus Pontiac powered cars - with the Olds shaker being slightly lower in relation to the hood. If the intake manifold and carb is stock on your 400, you should be able to get any '77-79 shaker from a Pontiac-powered car, and it should work. We do not offer the shakers since they are no longer available new. When the intake and/or carb is changed, this will often change the height of the shaker as well.

Good luck with the car,
Keith Maney
YearOne

I have not bought from this guy but he does make a slightly taller version of the shaker called the "Dude Scoop".

http://www.angelfire.com/fl4/pontiacdude428/Scoops.html