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.

Re: 283 pistons
 

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

Re: 283 pistons
 

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

Re: 283 pistons
 

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

Hope this helps,

Re: 283 pistons
 

Thanks for the info.

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

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.

Re: 283 pistons
 

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.

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.

Re: 283 pistons
 

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.