I have a 1968 pontiac bonneville no post coupe. As far as I can tell it has a 400. The block has YE 752918 on the front of the block and 248 stamped on the back by the distributor. It also has a two barrel carb on it. It think that it is supposted to have a four on it though. See the motor was rebuilt or replaced in 1973. THe carb has 7029060212xj satmped on it and the intake has 9794233 and j218. The axle has VD stamped on it. The cowl tag has a buid date of the last week of may. Any help with this mystery would be greatly appreciated.
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