If your going to pull the motor and rebuild Just do yourself a favor and ditch them (even when ported) restricted intake and manifold. For the price you cant really go wrong with a nice Trickflo Track heat upper and manifold. Just keep in your mind 1 thing that I have learned. If you Pintch Pennys You will get Pintched. Also Be aware there are oil problems with 347ci Buildup's when not using the Correct Piston Ring Setup (or the more Expensive one's) I suggest going with the 331ci if this will be also a daily driver. The Horsepower comparisons between the 2 are hardly worth the extra oil blow by.
That problem has been fixed.
It has been fixed for a long time now.
A 347 can be a reliable choice for a street car and doesn't have to burn oil
like they did when they first came out.
I do agree if one used the wrong parts ... as you pointed out ...they would
not obtain optimum results.
It looks by that last sentence ... If one went with the additional cubes ...
they are gonna have problems.
I've looked into this a lot ...
I'v seen many 347 owners who have been happy ...
Been happy for years now ...
and
Don't complain about oiling issues.
I just wanted to say ... there is another side to this issue
A nice NA street combo with a good tune can easily make 1rwhp for each
cube. This has been proven over and over. This is also with drivability
that could be used with a daily driver
Lets get real ... the bulk of 331-347 Stroked NA combos built are not
daily drivers.
Never the less ... I'll go for that additional 16rwhp and the additional
torque of the larger motor every time.
If I was gonna build a high hp forced combo ... I would most likely look
at the smaller size.
Grady