[C1] 548 block stamp pad
Drifting
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From: Putnam Valley, New York. Amateur Radio Operator K2NS
Suffix
An "L" suffix decodes to an engine from a 1956-57 265, 2 barrel, manual trans, HD truck. 30, 40 & 80 series.
RON
RON
Last edited by rongold; Sep 7, 2019 at 04:39 PM.
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C2 of Year Finalist (track prepared) 2019
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C2 of Year Finalist (track prepared) 2019
I doubt it. If they had intended to make a heavy duty casting, it would almost certainly have been given a different casting number. It's possible, however, that 548 truck engines were built with better bearings and maybe other HD internal parts. That's speculation on my part, though.
The only oddity about 548 blocks is that they were used to build both 265s, with a 3.75 bore and 283s with a 3.875 bore.
Jim
The only oddity about 548 blocks is that they were used to build both 265s, with a 3.75 bore and 283s with a 3.875 bore.
Jim
Last edited by jim lockwood; Sep 7, 2019 at 09:52 PM.
Drifting
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From: Putnam Valley, New York. Amateur Radio Operator K2NS
Thread Starter
Racer
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I doubt it. If they had intended to make a heavy duty casting, it would almost certainly have been given a different casting number. It's possible, however, that 548 truck engines were built with better bearings and maybe other HD internal parts. That's speculation on my part, though.
The only oddity about 548 blocks is that they were used to build both 265s, with a 3.75 bore and 283s with a 3.875 bore.
Jim
The only oddity about 548 blocks is that they were used to build both 265s, with a 3.75 bore and 283s with a 3.875 bore.
Jim
Drifting
Joined: Jul 2005
Posts: 1,977
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From: Putnam Valley, New York. Amateur Radio Operator K2NS
RON
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C2 of Year Finalist (track prepared) 2019
To the best of my knowledge any '548 block 265 can be re-bored to be a 283. I don't have first hand experience doing it, but I've never heard of anyone punching through to the water jacket. Best, I think, to have the block sonic tested before you start.