Another piston option for the 273.

Because im running a stroker crank the 6.123 rods will work in my project.
Even thou the Holden 253racing pistons are 2.92mm lower than the Mopar.
For those not going to stroke thier motor maybe rods with around the length of 6.250 as suggested by Rumblefish360. For the racing piston to achive the same position as the LA the rod would need a length of 6.238. Im still looking i may even go for longer rods myself.

Here is a bit of a comparison chart between the GM253 and LA273

Spec. LA273. GM253 Difference
Bore 3.625 3.625 0
Stroke. 3.31/my app3.58*. 3.062 -0.248
Comp ht. 1.80 1.685race piston -0.115 piston to be at LA HT rod=6.238
Piston wt 530-569gm. 513-550gm =
Piston lgth stock 3.19 3.050 -0.140
Rod lgth 6.123 5.621 -0.502
Pin dia. Full float 0.9842 Pressed 0.9272. -0.057
Pin lgth. 2.810-2.826 2.705-2.735. -0.091
Skirt below
Centre line of pin. 1.39. 1.365. -0.025