273 crankshaft/340

pishta said
273 is balanced for lighter rods and pistons. When you add the new pistons (+) and lighter rods (-), youll still be way off, needing more weight in the 273 crank throws.

Not necessarily..... it depends on what rods you use. If you use 602 gram SCAT I-beams with the stock weight 340 pistons (like SpeedPro's), the bobweight drops to down around 2059 grams, which is lighter than the stock 273/318 bobweight (at around 2147 grams). So in that case, you can balance a 273/318 crank for a 340 by simply taking weight off the 273/318 crank.

It cost me under $100 to have our 273 crank rebalanced to light 340 pistons/pins/rods. It was cheap because I gave the bobweight to the machinst; he did not measure it; processing the rods and pistons is where most of the balance cost is.

pishta said
Adding weight to a steel crank is $$ tungsten or whatever the balancer down there is going to use. I understand you have no balancers in Mex so Im wondering how the pricepoint of a 273 with a $$ balance and manual trans bushing machining process (?) will compare to a used 340 steel crank sent down there with a cheaper balance that will only have to remove material? Your other option would be to weigh your stuff accurately, and maybe send the specs to Eagle/Scat/? and have them balance you one out of the factory? Tough call with minimal machininsts. you can always balance a cast crank to lighter weight rod specs.
Chrysler/Plymouth/Dodge 340 cast crankshaft | eBay

Yeah, you can do anything, but adding weight is pricey.

Are you saying there are no shops in Mexico that can balance a crankshaft? I am surprised....

OP, I'd suggest that you to look at SRP or KB pistons, like the KB243's. With the open heads, they will be above-deck like the stock or SpeedPro 340 pistons, and your compression will be right around stock. Really light too. So you can save a LOT of $$ versus a stroker kit. Hope you block works out.