Slant six over bore .080

[67belevdere/225]

won't touch the pistons , going to speak with my machine shop there really good been around over 40 years
been dealing with them since mid 80's

 

[RustyRatRod]

When you use the original Buick piston and pin and bush DOWN the rod.... Press the .901 bushing out of a Mopar rod and press in a .825 ID bushing...... You gonna bore 6 Buick pistons and remove .026 to fit a Mopar rod or are you gonna buy 6 .875 ID bushings and press the Buick into a Mopar rod. Set up and machine bore and then hone 6 pistons or press a bushing into 6 rods? Id do the machine shop estimate before I chose between those 2. And 2 more for your 2 extra V8 pistons.
View attachment 1715827897

No. I would hone the Buick piston out to the Mopar rod and press the Buick piston on.

 

[67belevdere/225]

I bought a spare engine ( now 2 spare forged crank , and 81 dippy engine) and it came with the later head
already rebuilt , im thinking of porting it and using that head instead of the 67 one
lots to think off, I m taking a week to take car of personal stuff, before I \satrt some winter restorations projects , im so over booked with covid , people are spending on cars what they didn't on vacation!

 

[67belevdere/225]

No. I would hone the Buick piston out to the Mopar rod and press the Buick piston on.

im going to see what the motor shop says , im 30 over already , but wanted more just cause.lol

 

[RustyRatRod]

im going to see what the motor shop says , im 30 over already , but wanted more just cause.lol

If the Buick piston can be made to work it would be an excellent choice to get compression up with the stock 225 rod.

 

[67belevdere/225]

If the Buick piston can be made to work it would be an excellent choice to get compression up with the stock 225 rod.

im already at 9.5 , the head shaved .100
I was on the highway going home and this modern mustang and gunned and the stand had a hard time catching me. he caught up with me at the light and he though I had v8 , then he saw my set up at the local burger stand meet up, and now he is looking for a slant six!!

 

[volaredon]

Them bushings are gonna be so thin that there won't be enough of them for adequate support, I bet they get pounded out in short time

 

[RustyRatRod]

Them bushings are gonna be so thin that there won't be enough of them for adequate support, I bet they get pounded out in short time

Right. That's why I would advocate honing the wristpin bores. You could damn near do it with a brake cylinder hone.

 

[valiantpatrol]

I was under the impression that later model blocks had thinner cast walls in the cylinders and had lower limits on acceptable overbore size compared to earlier blocks. Being a '79 block isn't he already at/near the limit at .080 bore oversize?