Thoughts on boring a 440 block to 60 over

[BeastlyBirdie]

.060 is normal, but 64 is right. If you can, sonic the block. I'd personally never bore any block without a torque plate, nor without squaring. Everyone built plenty of these before sonic testing was available, but...we also took brand x big blocks out to .080 with no problem....usually, lol.

 

[Budnicks]

.060 is normal, but 64 is right. If you can, sonic the block. I'd personally never bore any block without a torque plate, nor without squaring. Everyone built plenty of these before sonic testing was available, but...we also took brand x big blocks out to .080 with no problem....usually, lol.

I agree... Yeah or to 0.100" over, BBC.... Sonic Checking it's just cheap insurance either way, been around sense the late 70's at-least & especially if the block has any noticeable core shift, or it's going to be a performance/race build your putting a bunch of money into, money well spent...

 

[35desoto]

The real late B or RB engines had thin walls and were limited to .030 however that was the late 400's and the last of the 440's around 77/78. A block of your age will safely take a .060 over bore.

 

[Photon440]

The real late B or RB engines had thin walls and were limited to .030 however that was the late 400's and the last of the 440's around 77/78. A block of your age will safely take a .060 over bore.

These guys would argue that point...
http://www.440source.com/blockinfo.htm

 

[super-bee_ski]

I wouldn't be thinkin about it, I'd be doin it.

"Rusty's back!


Anyway, are you sure you need another .030?

Go for it as everyone says BUT that must be some BIG scoring you have there..
A piston let go?

 

[66Satellite47]

We started sonic checking big blocks in the late 70's. In the mid 80's we sonic'ed 10 -12 440's of different years at the same time. The '67 - '73's were in the same general thickness range, core shift & major/minor thrust varied block to block. I kept 5 of them & the 76 & 77 were definitely thinner, but would go .030 easy & still be about .200 if I remember correctly. One '70 was much thicker than the rest & I still have that one and a '71 that was the second thickest. I'd say most any '67 block can go .060 with no trouble, just a few ponies less than a thicker one. My two 400 blocks I used were 72's & they were clearly thicker than all the 76 & later 400's we tested.

 

[HT413]

"Rusty's back!

This is a 2 year old post, sure miss that crazy fella though.