hello- i'm new here so bear wth me. i have a 1969 455 and a short shaft 400 for sale. the motor is fresh from machine shop and tranny just gone through.intake to oil pan. looking to sell both. they are located in chiefland florida. email for pictures and information. very nice condition. has not been run since return from shop. was in 1969 prostreet 442. sold car . will take best offer for each.. 352-493-1832. sickpair@bellsouth.net thanks john also have trunk lid for 1969 cutlass hard top, copper color with no rust. also best offer.

 

How did you get the discplacement of 472? Not being smart, just curious.

 

Isn't a 455 bored .030 over 472ci? Or is it 461? I can't remember.

 

i believe its 60 over. thanks john

 

You were not in the minority.

4.156 X 4.25 X 8 = 461.23 = "461". According to this calculator.

4.186 X 4.25 X 8 = 467.92 = "468".

Any difference in power, would be insignificant.

Norm

 

Well, those are the two "bored out" discplacements I am familiar with but I have heard of stroker combos that use rods from chevy or ford so I wasn't sure, I guess that might be possible.

 

.080 over would be a 472!

 

If that was the case, it would be an unusual combination and I would have expected a more complete description.

And if "80 over" pistons were readily available, and commonly used, Oldsguy would not have asked the question.

Norm

 

John, did you ever sell the engine?

 

I have heard that you can go .120 over on some engines. Probably Chevys.

 

The rebuild info including piston size should be on the engine rebuild receipt?

 

You can go either 1.100 or .110 on d/dx deisel blocks. I know that that is a big difference, just can't remember which, I think its the 1.100, because from 350 you can get near 500 ci, so I've heard.

 

It's a 72 Fa block with E (68-70) heads.