305 Stocker Block Question

[Jeremy K]

Originally Posted by Greg Hill

Why can't you run a 4 bolt main block?

I'm interested in the answer to this as well.

I'm sure the Dart Block that Bub suggests is 4 bolt. I don't see the part number in the accepted parts list yet, just the 4.00" bore SHP. Does anyone have information on whether it will be added soon?

I could also drive 1.5 hours to pick up a (factory) 4 bolt main 305 block.

I wouldn't want to get either of these and have them end up being illegal.

Jeremy

[Tim H]

Originally Posted by Jeremy K

I'm interested in the answer to this as well.

I'm sure the Dart Block that Bub suggests is 4 bolt. I don't see the part number in the accepted parts list yet, just the 4.00" bore SHP. Does anyone have information on whether it will be added soon?

I could also drive 1.5 hours to pick up a (factory) 4 bolt main 305 block.

I wouldn't want to get either of these and have them end up being illegal.

Jeremy

I have never seen a factory 4 bolt main 305 block ... ?

[Jeremy K]

Originally Posted by Tim H

I have never seen a factory 4 bolt main 305 block ... ?

I haven't seen this one either. A friend of mine saw it and told me it was for sale. Came in Canadian service trucks/vans.

Sounds like the small bore Dart block is a no go. If I carry the 4 bolt main 305 around, maybe the sleeved 4 bolt main 350 will be deemed legal. Or maybe the filled 305 blocks will be just fine, looks like they are a common option.

Thanks for the input thus far.

Jeremy

[Kenny Wigington]

I had one about 10 yrs ago. Had I known I was going to try Stock, I would have kept it ! Came out of a Generac Natural Gas Genset off the rear of a Dr's office. 5.0L /w 4 bolt mains. I sold it to a guy who had a round track truck.

[Dean Feiock]

I won't debate the issue of their existance. I'm quite sure that in the US market, in GM production passenger cars and trucks, GM never installed a 4 bolt, 2 piece rear main seal, 305 block.

Among all the wording in the rule book, it states "no export, marine, or special equipment". That was the reason I was given when I asked years ago. Which in a nutshell means power plant, marine, and over the border parts don't qualify for stocker use (in most cases).

I have not seen one, but I am told the pallet of small bore Bowtie blocks that Patterson bought are two bolt to comply with the rules.

To be honest, at 400 HP, a good two bolt block with nodular caps and high quality sleeves is more than adequate.

[nolongerracing]

After approving the Dart SHP block for stock and superstock, do you really think that NHRA cares what you do with your $50 305 block? Do you think they are ever going to look at a bottom of an engine again?

[Mike Taylor 3601]

Where in rule book does it say anything about has to be 2 bolt block?
Mike Taylor 3601

[Dean Feiock]

Originally Posted by nolongerracing

After approving the Dart SHP block for stock and superstock, do you really think that NHRA cares what you do with your $50 305 block? Do you think they are ever going to look at a bottom of an engine again?

I don't use a 305 block. As I stated, I use a 307 or 350 block.

All the things I do to my blocks (block true, lifter true, align hone, etc), need to be done to a new Dart block as well. If you have never used one you should note that they don't come finished.

The fact that Dart is not making a "small bore block" means you will need to install sleeves, just like we do in 307 & 350 blocks. The only difference is that we start with, as you put it, a $50 block instead of a $2000 block. The required prep work is the same.