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I pulled the original one off the 400 to clean it up and put in the gasket with exhaust crossover blocked off. It was leaking pretty good and just ugly aswell as Id like to have the carb a little cooler. I might put the 383 one on since I'm there anyways it should be worth the slight gain

I've got a rebuilt 76 400 sitting beside the car here i believe it's 9.8 compression nothing crazy but around 400 horse it's going in when I hit 100,000km with the original engine which should be like another 2 years at my rate.

I picked it up without lean burn 4150 double pumper carb on it wired the electric choke to a pressure switch on it running standard distributor with vacuum advance been playing with stock ignition and gm modules different ignition setups. Carbs isn't right I know I've got it as close as I can...

So I've got the carb off my 78 400. It's got the stock 4 barrel EGR intake with block off plate on the EGR. Don't need EGR where I live. I have a 68 383 4 barrel intake just sitting and I'm wondering if there would be any advantage to installing the 68 383 4bbl intake over the stock 4bbl intake...