283 pistons

Jim Hawkins · 01-20-2015, 11:22 PM

Does anyone make a stock replacement shelf flat top 283 piston larger than .060 over? This would be for a restoration project and the block is at .060 now. Early 721 nova block.

FED 387 · 01-21-2015, 12:08 AM

at one time Federal Mogul made them--- not sure if they are still available--FED 387

my69396 · 01-21-2015, 10:02 AM

Check with Egge Machine. They even have 4in 283 pistons for a old school 301.

BillK · 01-21-2015, 10:47 AM

Jim,
Looks like Silvolite has them in .080, part number 1412.

Hope this helps,

Jim Hawkins · 01-21-2015, 03:14 PM

Thanks for the info.

Tom Meyer · 01-21-2015, 07:58 PM

That block will go to 4 in without any problems, save the hassle with getting the big overbore stuff. Put a 327 SJ crank and stock 4 in bore piston and have fun. Most of 721 blocks were good pieces and were built to go to the 327 in the 65 cars. Tom

Jim Hawkins · 01-21-2015, 11:33 PM

Tom, that is what I intended to do with this block. I am selling this block and the guy who needs it for his 64 nova is afraid it will run hot at 4.00. I told him that it has been done before but it scares him. Oh well go figure.
BTW I also have a 3862194 block from a 67 nova, are these as thick as the 721 blocks? Never had it sonic tested.

james schaechter · 01-22-2015, 07:37 AM

Quote:

Originally Posted by Jim Hawkins

Tom, that is what I intended to do with this block. I am selling this block and the guy who needs it for his 64 nova is afraid it will run hot at 4.00. I told him that it has been done before but it scares him. Oh well go figure.
BTW I also have a 3862194 block from a 67 nova, are these as thick as the 721 blocks? Never had it sonic tested.

The 194 is a good block for a 283 street car. It is as thick as any regular 283 block. Probably a better choice for a 283 street car. The 721 block is an awesome 283 race block! It would be a shame to waste it on a street car! Gm made these same blocks into 327s for Chevy 2s so overheating would not be due to thin walls.

Jim Hawkins · 01-22-2015, 11:33 PM

Is it worth the cost or necessary to put 4 bolt caps or fill the 721 block for a race car motor? This block I have was from a old modified motor. 3.935x3.00 292 cubes. Not filled and stock caps.

james schaechter · 01-23-2015, 06:41 AM

Quote:

Originally Posted by Jim Hawkins

Is it worth the cost or necessary to put 4 bolt caps or fill the 721 block for a race car motor? This block I have was from a old modified motor. 3.935x3.00 292 cubes. Not filled and stock caps.

I guess it depends upon the power and rpm. We put studs on ours, but kept the two bolt caps. Never had issues and went 8000 plus in our stocker.

01-20-2015, 11:22 PM	#1
Jim Hawkins Member Join Date: Jan 2010 Posts: 198 Likes: 89 Liked 115 Times in 35 Posts	283 pistons Does anyone make a stock replacement shelf flat top 283 piston larger than .060 over? This would be for a restoration project and the block is at .060 now. Early 721 nova block.

01-21-2015, 12:08 AM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,420 Likes: 529 Liked 333 Times in 180 Posts	Re: 283 pistons at one time Federal Mogul made them--- not sure if they are still available--FED 387

01-21-2015, 10:02 AM	#3
my69396 Member Join Date: Feb 2008 Posts: 286 Likes: 0 Liked 46 Times in 20 Posts	Re: 283 pistons Check with Egge Machine. They even have 4in 283 pistons for a old school 301.

01-21-2015, 10:47 AM	#4
BillK Member Join Date: Nov 2005 Location: Waldorf Md Posts: 230 Likes: 12 Liked 30 Times in 17 Posts	Re: 283 pistons Jim, Looks like Silvolite has them in .080, part number 1412. Hope this helps, __________________ Bill Koustenis

01-21-2015, 03:14 PM	#5
Jim Hawkins Member Join Date: Jan 2010 Posts: 198 Likes: 89 Liked 115 Times in 35 Posts	Re: 283 pistons Thanks for the info.

01-21-2015, 07:58 PM	#6
Tom Meyer Senior Member Join Date: Aug 2003 Location: Pierce NE Posts: 936 Likes: 78 Liked 354 Times in 120 Posts	Re: 283 pistons That block will go to 4 in without any problems, save the hassle with getting the big overbore stuff. Put a 327 SJ crank and stock 4 in bore piston and have fun. Most of 721 blocks were good pieces and were built to go to the 327 in the 65 cars. Tom __________________ Tom Meyer 5240 SS Stock ???

01-21-2015, 11:33 PM	#7
Jim Hawkins Member Join Date: Jan 2010 Posts: 198 Likes: 89 Liked 115 Times in 35 Posts	Re: 283 pistons Tom, that is what I intended to do with this block. I am selling this block and the guy who needs it for his 64 nova is afraid it will run hot at 4.00. I told him that it has been done before but it scares him. Oh well go figure. BTW I also have a 3862194 block from a 67 nova, are these as thick as the 721 blocks? Never had it sonic tested.

01-22-2015, 11:33 PM	#9
Jim Hawkins Member Join Date: Jan 2010 Posts: 198 Likes: 89 Liked 115 Times in 35 Posts	Re: 283 pistons Is it worth the cost or necessary to put 4 bolt caps or fill the 721 block for a race car motor? This block I have was from a old modified motor. 3.935x3.00 292 cubes. Not filled and stock caps.