I have a block with casting number 2406730. According to everything I find that is a 426 wedge/max wedge 1963-1965.
The weird part is the bore measures out at 4.180 not 4.250. I used a dial caliper to measure it. I honed it with a flex hone too check the cylinders for cracks. It has a small lip from wear, and this is where I measured it.
It is not sleeved and has the original bevel around the top of the cylinders for assembly
The second weird thing is that the last 3 digits of the casting number seem to have been ground down! Not completely but almost
The casting date is 8/16/63
the i.d. pad on top has a 41 with an iron cross symbol nothing else,
I am stumped, any suggestions?
72 duster
452 13.5:1, Indy SR's Wiend Team G 1050 holley
1.45 60', 10.52 e.t. 127mph spinning tires
68 Cuda
440 stock bottom end 906 heads 4.30 gears leaf spring with snubber
1.50 60', 11.15 e.t. 120 mph.
65 coronet
5.7 Hemi 46rh trans.
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