273 time to 'fish or cut bait'...

nm9stheham said
This is where I admit I get confused... my '65 FSM shows an illustration of the 273 rockers and they are stamped..... that is why I have to wonder if the heads/rockers have been swapped at some point. A lot of this has gone on and with the changed manifold, who know what you have?

OP, if you continue with the 273, knowing what heads you have is needed to plan out the right pistons.

And I disagree with the idea of using 2 BBL 273 pitons; the EGGE 4 BBL pistons will barely get you to a true 9:1 static CR with the right heads. The 2 BBL pistons will actually end up at a 8:1 or less. The OP wants lots of good torque for his use... .which points to higher CR and more cubes.

I wonder what's going on there. All 64-7 273's had solid lifter cams. The hydraulics didn't come out until 68 when the LA 318 was released and the 273 followed suit. The 273 was dropped in 69. I think the 4 barrel pistons and the increase in compression is one more thing on the list to make the 273 run even better. The compression, slightly bigger cam, 4 barrel carb, the dual point (to a lesser degree) and the HP exhaust all worked as a team to make the 235 hp that Mopar advertised. If you have to bore the block, why not use the higher compression pistons? The difference between 8:1 and 9.5:1 is a sizable difference.