Mopar 273-4bbl Combo

Terry Bride · 11-25-2016, 03:19 PM

I'm slowly working on this same combination for a 66 Barracuda.

You need to keep in mind that the sleeve will need a step to retain it in the parent bore. You can't stick a 3.910" O.D. sleeve into a 3.910" bore. There will be nothing to support the sleeve. You will need a sleeve with enough oversize beyond the parent bore dia. to allow an adequate step to register against. I have not found any straight sleeve with enough wall thickness to do this. In this case, the only way to do the sleeving correctly is to get a set of flanged liners and counter bore the deck for the flange.

A custom sleeve will be an expensive investment along with some fairly substantial machining costs but in the end, you will have a block that will maintain it's bore size for many re-hones.

I will have to sonic test the 1967 273 block I have to see what it has for thickness.
In the mean time, I am saving up to purchase the pistons and maybe sleeves.

11-25-2016, 03:19 PM	#18
Terry Bride Junior Member Join Date: Jun 2011 Posts: 23 Likes: 8 Liked 0 Times in 0 Posts	Re: Mopar 273-4bbl Combo I'm slowly working on this same combination for a 66 Barracuda. You need to keep in mind that the sleeve will need a step to retain it in the parent bore. You can't stick a 3.910" O.D. sleeve into a 3.910" bore. There will be nothing to support the sleeve. You will need a sleeve with enough oversize beyond the parent bore dia. to allow an adequate step to register against. I have not found any straight sleeve with enough wall thickness to do this. In this case, the only way to do the sleeving correctly is to get a set of flanged liners and counter bore the deck for the flange. A custom sleeve will be an expensive investment along with some fairly substantial machining costs but in the end, you will have a block that will maintain it's bore size for many re-hones. I will have to sonic test the 1967 273 block I have to see what it has for thickness. In the mean time, I am saving up to purchase the pistons and maybe sleeves. Last edited by Terry Bride; 11-25-2016 at 03:21 PM.