I guess the real question is "Better for what?"
Exactly
Look at my sig combo and consider it has just 50K miles
so
The block is fairly tight and fresh
so
I see it as practical to use the OEM block
Considering all that ... a blower at low boost could be very practical ... For Me
Now ... Say I had a high mileage motor with just a few minor bolt ons
but
Nothing like the aftermarket stuff I now got
Then ... You Bet
An all motor 347 would be on the short list
or
Maybe ... a fresh 302-306 with a blower
See where I'm going here?
as I currently am ...
Most of my combo would be too small if I decided to go 347
and
I'm not a good candidate for a high boost setup
Hey ... Its all about application
and
That application can be influenced by ... circumstances
Grady