yellow rose
Overnight Sensation
Anyone Know What 412 Means on ROSS 340 Pistons , Looking at another 340 block But he measured with a measuring tape says its 104mm bore 104 would be stock wouldnt it???
A 104mm bore would be ALMOST .060 over by my math. Comes out to 4.09xx so that ain't a stock bore if it is 104mm.
You really need to verify bore size by caliper and bore quality with a dial bore gauge.