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did mopar ever make a 4 bolt 340 block ? value ?
yes and it depends which one , there's the x block and r3 blocks and maybe more could be had with 4 bolt mains , but no passenger car 340 were 4 bolt , the x and r3 are race blocks .
I think some of the TA blocks had 4 bolt mains. @Alaskan_TA can tell you for sure.
I'm pretty sure the T/A blocks just had extra webbing added so that aftermarket 4 bolt caps could be added. But your right, Rob, Alaskan TA is really the guy that would know.
No the T/A's did not have 4 bolt mains but they did have thick webs for 4 bolt mains if you wanted to install them.
I'm probably getting them confused with some of the letter blocks then.
All stock blocks are 2 bolt mains. Except..... The ‘70 T/A - AAR 340 6 pack engines had the thick/filled in areas that could be drilled and tapped for a 4 bolt application. Not all of MP race blocks came with 4 bolt main caps. All of the race blocks could be tapped for 4 bolt main caps.
^^^^^^^^^^^^^^^^ That should be made a sticky.