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What’s stamped on the block only referenced what it had when new. Back in the 80’s, I witnessed the tear down of a matching # block in a ‘71 V code ‘Cuda. It had a cast crank and the 8.5 to 1 pistons in it. It ran great, but the guy said it didn’t seem to make much power. 8^]
I bought both my E87 D21 ‘70 ‘Cuda and ‘70 Charger back in the early 80’s specifically because they were factory 4 speed cars. Even then gathering all the parts was a daunting task.
Yup. One and done. I’m a Mopar lifer. And I remember the hot ticket was the ‘67 915 closed chamber heads that have “HP” stamped on the two bolt boss. I put em on my ‘70 Six Pack Charger for a little extra compression. Back then they were worth money as the 906 heads littered the junkyards.
I can’t imagine anyone using the old cast iron heads, unless the are going OEM resto or get a freshly done set for cheap. The aluminum heads will allow you to run higher compression on pump gas. They will take about 50 lbs. off the front end, and most flow way better than any stock head.
Sorry about that. I don’t mean to dis the OEM resto crowd. But this is the drivetrain forum. And… I haven’t been on BAT in months. Tired of all the 911’s and old Broncos. But a ‘63 Split Window Fuelie Vette just moved for $250k. Another ‘63 SW Vette with an LS in it went for $280k. So the hot...
I probably did hundreds of oil changes on these cars, and I’m sure I glanced at it, and never put 2+2 together. I just thought it was an interesting thing I never knew about.
It’s probably just a variation hole when everything is jigged up on initial fabrication. Once the line is up and running, it’s not used. Like Tony said, there are holes pinned for alignment.
I meant the one I pictured is the same ‘68-‘70 b body. My ‘70 ‘Cuda is the ‘71 B body under hood, and is probably the same as that, and different than the earlier years.