Mopar 273-4bbl Combo

[James L Miller]

Originally Posted by Don Anderson

X2
Matt Steen @ 507-532-2436

I finally got in touch with Matt today. We had been playing phone tag for a few days. He gave me the advice of using a 318 block (he preferred an X block, not many of those around with the unbored 3.91" bores) and sleeve it down to 273 bore sizes. I think I agree as I was talking to my machinist in Tampa and he did a quickie sonic check and got wall thickness in the .160"-.180" range with standard bore blocks. It looks like Melling has some 1/8" wall sleeves that would fit in a standard bore 318 that would get them down to NHRA specs. He also seemed to prefer the 302 heads over the 920 heads. He is building a 273 stocker engine now. Matt had run the 273-4 engine as a stocker many years ago and said it was making around 330-340 HP back then.

So it looks like we either hard block the 273 blocks or sleeve a 318 down.