Quote:
Originally Posted by markpj23
Looks like I have the 6X heads w/the vertical boss, so 6X-4 heads.
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428 with 670s. More torque. No need to buy a stroker kit. All you need is a set of dished pistons and aftermarket rods, and of course bearings, gaskets, cam, lifters, etc. I would also install one-piece valves and hardened seats in the heads. But, you don't need an aftermarket crank or anything special. Cubic inches are king and if you have the budget, go for it. Plus the 428 will look correct.
You said "6X with the vertical boss" - what does that mean? 6x-4 and 6x-8 are identical castings, the only difference is the chamber size and the little number stamped on the machined pad (Secondary Stamping in the attached picture). If you're referring to the presence of the machined pad where the number is, the existence of that pad doesn't mean anything. The number stamped on it is what you need to look at.