Originally Posted by
**CHRIS**
^ is full of shit.
If the motor is built right, there are no reliability issues with going 347 compared to 331.
Bottom line, if you are gonna stroke it, might as well get the cubes.
There used to be an issue with the ring lands on the pistons for a 347 that caused some oil blow-by... that issue has been resolved with every single new rotating kit: probe/scat etc....
I'm not full of "sh!t". The info I have may be out dated, but it is still legitimate info. You see, an engine will perform until it is broken. The more you use the engine and the harder you push it, the faster it will break. Also, the 331 uses a shorter stroke if I'm not mistaken, when compared to the 347. Why is it that a small block can rev higher than a similarly built big block again? Oh yeah, the rotating mass is less in the small block. It's the same thing with the 331 vs. 347.
Don't gte me wrong, there are MANY 347's out there that see DD duty, and are just fine with it. And did I ever say for him not to get either on of the motors? Nope. I just gave my own opinion. Of course, it's an opinion....and I'm about as qualified (on this subject anyway) to give one as a doctor is qualified to give an opinion on how to build a house.
LOL