You have a very early 1969 base model engine. If it is a 429, then it is as much a Thunder Jet (not Cobra Jet) as any other 4-barrel 429, and is factory rated at 360HP. Might be a 460, too, but the only way to tell the difference is by unbuttoning the pan...unless the tag is still on the intake manifold.gjgkeb said:
1969 429 and 460 longblocks are made of 100% identical interchangable componenetry except for the crankshaft and pistons (which are exclusive to each of the engines). Even the bore is the same on both engines.
Paul