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07-07-2022, 09:35 PM | #1 |
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FYI for 305 sbc racers
Talked with Dart today. The 305 little M block is no longer in existence. Discontinued. They are replacing it with a 305 SHP block but it will be at least 6 months before one is produced. Oh, and the part number changed and the new number is NOT on the approved list.
Little M 305 31151411 New SHP 305 31161411 |
07-08-2022, 01:52 PM | #2 |
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Re: FYI for 305 sbc racers
And from what I've been told the SHP blocks are now being cast in China
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Phil Molski PMR Performance S/C 1623 |
07-11-2022, 02:05 PM | #3 |
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Re: FYI for 305 sbc racers
Would a sleeved 400 block work, it would have thick cylinder walls.
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07-12-2022, 07:43 AM | #4 |
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Re: FYI for 305 sbc racers
I purchased a 305 Little M block in early 2020 but it was stolen out of my engine builders shop, and then Dart discontinued them. Now it appears they are making a new 305 block with a different part number.
I'm kinda new to all this, what is the procedure to get the new P/N approved? Can I initiate it or does Dart have to? Thanks.
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Tom Johnston 3177 84 Cutlass 305 L/SA M/SA |
07-12-2022, 07:09 PM | #5 | |
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Re: FYI for 305 sbc racers
Quote:
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07-12-2022, 08:23 PM | #6 |
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Re: FYI for 305 sbc racers
The mains are a different size - I don't know if spacer bearings would be legal?
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Phil Molski PMR Performance S/C 1623 |
07-14-2022, 08:55 AM | #7 | |
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Re: FYI for 305 sbc racers
Quote:
I haven't done this myself - yet, but wouldn't a good 4" 350 block be a reasonable choice? Main bores are right size and the cylinder walls (once sleeved ) would be pretty thick as well without the cooling problems like cracking from the steam holes between the cylinder bores. Just my 2 cents from my little corner of the world! Respectfully, Henry Kunz 1534 H/SA |
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07-15-2022, 05:26 PM | #8 | |
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Re: FYI for 305 sbc racers
Quote:
Sleeved blocks work very well if done properly. I have a 350 block that is sleeved and a 307 block that is sleeved. Personally, I think the 307 block is better as it was an early casting block and had very thick cylinder walls to start with. I know that people say it costs too much or it's too much work to sleeve a block. But when you factor the cost of an aftermarket block and all the required machine work to true up every surface of a new block, I don't think those claims are valid. But I'm old and my stuff is slow, what do I know
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Dean Feiock -- Stock 5002 Last edited by Dean Feiock; 07-15-2022 at 05:51 PM. |
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07-24-2022, 06:18 PM | #10 | |
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Re: FYI for 305 sbc racers
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https://www.competitionproducts.com/.../#.Yt3EtXbMKM8 Last edited by tscheerer; 07-24-2022 at 06:23 PM. |
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