305 engine block question

Lyn Smith · 11-27-2018, 03:44 PM

Planning the build for my next 265 Stocker motor.Will using a 305 block with the spacer bearings like I did for the first one.Are there any 305 blocks(cant afford a Bow tie) that are better to use than others? I will be boring it .060 (3.790).Thanks for the info.

Tim H · 11-27-2018, 05:36 PM

http://classracer.com/classforum/sho...t=canadian+305

SSDiv6 · 11-27-2018, 05:48 PM

This Ebay seller has a few of these blocks both 0.040" and 0.060" O.S. for sale.

https://www.ebay.com/itm/Small-Block...-/172866626342

Lyn Smith · 11-27-2018, 09:10 PM

Why does that guy have so many 305 blocks with no main caps??Another question is it a must to pour a 305 block?

carl hinkson · 11-27-2018, 10:29 PM

Quote:

Originally Posted by SSDiv6

This Ebay seller has a few of these blocks both 0.040" and 0.060" O.S. for sale.

https://www.ebay.com/itm/Small-Block...-/172866626342

.060 Over blocks you my want to sonic test before you buy it.

Dean Feiock · 11-27-2018, 11:19 PM

You may want to check with tech on the legality of a 4 bolt block. Back when my engines were built, I was told by Div 5 that a 4 bolt was not legal, only 2 bolt. But, that was a long time ago and things have certainly changed.

The eBay add states the block is bored and finshed honed. Um, how is that possible without caps on it. While I'm no machinist, I don't think I've ever heard of a block being bored and honed without caps on it.

Buying that eBay block, then adding caps to it, and then working out the bore will not be "cost effective".

If your going to spend that kind of money, I would recommend you sleeve a larger bore block or go aftermarket. I have a 350 sleeved and a 307 sleeved. The 307 block I used was an early model, cast in a 350 mold. It had very thick walls to start and then got 8 sleeves. Very good piece.

Lyn Smith · 11-28-2018, 10:23 AM

I will be staying away from the exotic 4 bolt main blocks,and the sleeved blocks because of the cost.I guess I just need to find a good used standard bore 305 block.Will check around here locally.Thanks for the info.

Bruce Witherspoon · 11-28-2018, 01:05 PM

Lynn,

Talk to Bob Downing. I'm sure they have a barn full of them.

Chipper Chapman · 11-28-2018, 01:59 PM

The 1996-2000 305 vortec blocks are supposed to be the best, but you would have to use a rear main seal adapter, just like many of the bowtie blocks had.

11-27-2018, 03:44 PM	#1
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,193 Likes: 272 Liked 950 Times in 189 Posts	305 engine block question Planning the build for my next 265 Stocker motor.Will using a 305 block with the spacer bearings like I did for the first one.Are there any 305 blocks(cant afford a Bow tie) that are better to use than others? I will be boring it .060 (3.790).Thanks for the info.

11-27-2018, 05:36 PM	#2
Tim H VIP Member Join Date: Jan 2007 Posts: 1,039 Likes: 1,062 Liked 481 Times in 158 Posts	Re: 305 engine block question http://classracer.com/classforum/sho...t=canadian+305

11-27-2018, 05:48 PM	#3
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,036 Likes: 710 Liked 1,538 Times in 575 Posts	Re: 305 engine block question This Ebay seller has a few of these blocks both 0.040" and 0.060" O.S. for sale. https://www.ebay.com/itm/Small-Block...-/172866626342

11-27-2018, 09:10 PM	#4
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,193 Likes: 272 Liked 950 Times in 189 Posts	Re: 305 engine block question Why does that guy have so many 305 blocks with no main caps??Another question is it a must to pour a 305 block?

11-27-2018, 11:19 PM	#6
Dean Feiock Member Join Date: Aug 2002 Location: Pierre, SD Posts: 204 Likes: 0 Liked 49 Times in 15 Posts	Re: 305 engine block question You may want to check with tech on the legality of a 4 bolt block. Back when my engines were built, I was told by Div 5 that a 4 bolt was not legal, only 2 bolt. But, that was a long time ago and things have certainly changed. The eBay add states the block is bored and finshed honed. Um, how is that possible without caps on it. While I'm no machinist, I don't think I've ever heard of a block being bored and honed without caps on it. Buying that eBay block, then adding caps to it, and then working out the bore will not be "cost effective". If your going to spend that kind of money, I would recommend you sleeve a larger bore block or go aftermarket. I have a 350 sleeved and a 307 sleeved. The 307 block I used was an early model, cast in a 350 mold. It had very thick walls to start and then got 8 sleeves. Very good piece. __________________ Dean Feiock -- Stock 5002 Last edited by Dean Feiock; 11-27-2018 at 11:25 PM.

11-28-2018, 10:23 AM	#7
Lyn Smith VIP Member Join Date: Dec 2001 Location: Pontiac,il. Posts: 1,193 Likes: 272 Liked 950 Times in 189 Posts	Re: 305 engine block question I will be staying away from the exotic 4 bolt main blocks,and the sleeved blocks because of the cost.I guess I just need to find a good used standard bore 305 block.Will check around here locally.Thanks for the info.

11-28-2018, 01:05 PM	#8
Bruce Witherspoon Member Join Date: Dec 2003 Location: Charlotte, MI Posts: 127 Likes: 3 Liked 5 Times in 3 Posts	Re: 305 engine block question Lynn, Talk to Bob Downing. I'm sure they have a barn full of them. __________________ Bruce Witherspoon 3656 SS/KA

11-28-2018, 01:59 PM	#9
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 473 Likes: 246 Liked 166 Times in 71 Posts	Re: 305 engine block question The 1996-2000 305 vortec blocks are supposed to be the best, but you would have to use a rear main seal adapter, just like many of the bowtie blocks had. __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090