Another piston option for the 273.

273 said

If the piston are Chevy pin size can't just use aftermarket Chev rods 6.125 and machine the crank and rods to fit ?

Click to expand...

I would say, the use of "Generic" rods comes into play here. Some of the cranks these days are already a reduced size for the Chevy sized journal. If not, machining the crank for the Chevy size journal comes into play. Aftermarket rods can be purchased with the MoPar journal size and Chevy piston pin size.
Lengths vary as well.i have seen 6.250. I do not remember if the small blocks had longer specs to the rods after that.

His plan is very much so a do-able one. The piston ether needs to be machined by the manufacturer or by him for the valves size and angle.

Once he or they know what height is needed, ether the manufacturer can modify the height or he can adjust it himself or change the rod length to accommodate.

I like this re-engineering a lot Mick.
Can you post pictures of this build?