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Pontiac of the Month

FBIRD69's 1969 Firebird

2024 March
of the Month

1978 Bonneville

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Posts posted by 1978 Bonneville

  1. What’s everybody’s thoughts on the 301 engine? I’m thinking about putting in a roller cam with roller rockers and lifters to make it perform like a race built engine. Kinda want to make it like GM made the engine in my chevy Silverado pickup. Also I’ve been reading up on the GM TH200-4R transmission and am wondering if it will increase my gas mileage considerably. I really like my 1978 Bonneville Brougham because it handles, rides, drives and is much more reliable than most new vehicles out there today and if I can make it better on fuel and performance that would be great

  2. JUSTA6 yeah the bumpers are really solid. The rear bumper has some spots where the chrome is off and there’s some rust. Someday I’ll find a place that does high quality rechroming and get it redone. I found I can really make the shine come out even better if I use 0000 grade steel wool and some Bar Keepers Friend mixed with water into a paste to scrub them. Worked well for getting the yellow out of the turn signal lenses mounted in the front bumper. Frosty thank you for the insight on where I can look to find those pieces

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  3. What ratio of gears did you use? I thought of seeing if a 2.72-1 ratio would fit the housing. That gear set was used in the Chevy pickups that had the Oldsmobile 350 Diesel engine. I had a 1978 Silverado that came from the factory with the 350 diesel but I installed a 1962 327 with two bolt main bearings that had a two barrel carburetor and it was really good on fuel coupled with that gear set and the turbo 400 transmission

  4. Frosty,

     

         I was tuning up my engine in my 1978 Pontiac Bonneville Brougham the other day and I noticed that I in fact do have a 4 barrel intake with a 2 barrel adapter with the EGR valve mounted to the adapter behind the carburetor. What would need to be done to mount a 4 barrel carburetor on this engine? It’s a Y code engine and it is factory original 2 barrel but I understand that the W code engine was a factory four barrel. Is it possible the intakes were different between the Y and W code engines even though the Y code has an adapter for the 2 barrel?

  5. I’m looking for the bumper filler panels that go under the headlights behind the front bumper and the ones that go underneath the tail lights on the rear. Also in need of the impact strip that goes on the front bumper as well as the impact strips that go on the front and rear bumper guards. Anybody have any or a source where I can find these items? I want to make this car look really great since these items are damaged and it will look much better with them on there as whole pieces instead of being broken

  6. Frosty thank you for some insight. Luckily the seat power switch is at the base of the seat and easily accessible so I’ll have to try this out and see what I come up with. Hopefully it’s a really simple problem and I don’t have to replace any seat motors. The car only has a little over 80,000 miles and I believe the seat was rarely moved as my grandparents bought it used in 1981. 

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