found a 1970 rivera gs for a cheap price inside is like new outside excelent except two small holes frame real nice 455 engin but this engin has crome valve covers and says stage 1 on aircleaner also has stage 1 emblem in grill coudnt read engin code on block could this have come in this car is it rare what price range would this be in thanks
I'm not sure how rare they are but they did make Stage1 Rivs and it looks like you might have found one! The only way to verify Stg 1 is to pull one of the heads and check the valve size. Not sure if it is indicated in the VIN on the Rivs or not. Cheap? Buy it
Stage 1 Riviera GS should have enginecode SS. But the book "American V8 Engines" says this: In 1970 there were three versions of the 455 engine: 350 HP, 360 HP Stage 1 and the 370 HP Riviera 455 So the original SF code engine was rated higher........ o No: ? Further reading: The highest horsepower-producing 455 CI engine was de 1970 Stage 1, which put out an advertised 360 HP. The Riviera 455 CI was advertised at 370 HP, but the Stage 1 put out more power There was a Stage 1 option on the 1970 Riviera GS models, but how many were fitted with the Stage 1 is not known. 1970 VIN doesn't tell you anything about the engine or GS option. Try to look for the carburator number :Smarty:
I don't think anybody really knows the HP. I was told it was between 385-400 HP check carb.# should be 7040246, dist. #should be 112016 and see if there is a ss between # 5-7 cylinder if there is then you know you have a stage 1 block
thanks everyone for help is 1000 cheap enough also just got a 66 rive has 455 in it not factory but nice job of butting in car keeping motor trans maybe rear posi may part out body a little ruff may donate to club members needing parts will see thanks hank
I could use some '66 Riv parts like seatbelts, power windows and exterior emblems, are you going to part it? Is the '70 Riv a bucket seats car? If you buy that one and part it, I would be interested in the bucket seats, console and shifter.
Where has anyone seen a Stage 1 option listed from Buick on a 70 Riviera? I have only seen one engine listed for 1970 Riviera. If there is something that shows Buick installed Stage 1 engines in 1970 Rivieras, please share it.
