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01-20-2020, 04:32 PM | #11 |
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Re: 403 Oldsmobile
Add a couple of others- Mike Mayhew ran a '77 Cutlass with a 403 a few years back and Mike Moyer ran a Olds 403-powered Firebird as well.
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Jim Kaekel 3836 STK |
01-23-2020, 06:10 PM | #12 |
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Re: 403 Oldsmobile
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01-24-2020, 01:53 AM | #13 |
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Re: 403 Oldsmobile
And?
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Dave Noll, E/FS ,L/SA 6526 |
01-24-2020, 09:46 AM | #14 |
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Re: 403 Oldsmobile
Those windows can be patched and welded up........You would have to be a hard core Olds person to want to bother. When you take a good look at a 455 block, I'am sure the bore and main housing bore size of the 403 block looks darn tempting.
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01-24-2020, 11:36 AM | #15 |
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Re: 403 Oldsmobile
In the eighties, there were scads of 307 cars being beat to death all over the country. Those were windowed too.
They held up well. They weren't nearly as fragile as some thought. |
01-24-2020, 12:17 PM | #16 |
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Re: 403 Oldsmobile
Im running a 307 window right now. Im only a little nervous as Im not making big power , but in the beginning I was crossing finish line at 7000 and was waiting for kaboom. Now things are more inline and rpm's are at 6300. I feel allot better now. Oil looks great and pressure is still the same.
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01-27-2020, 03:47 PM | #17 |
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Re: 403 Oldsmobile
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02-16-2020, 05:57 PM | #18 | |
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Re: 403 Oldsmobile
Quote:
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Bob Shaw V/SA 515 |
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02-17-2020, 11:00 AM | #19 | |
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Re: 403 Oldsmobile
Quote:
I have built engines with both casting numbers and the mains are hollow. Has your son torn apart his engine and looked at the block? |
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