Crate Motor

I would have to disagree, I would want the #'s matching car.
Everybody has a car that doesn't match and anyone can build a 6cyl car into something special so if you don't care get a 6 cyl car and have at it.
For the guy that cares, keep the car together, for a guy like you who doesn't care and I take it you don't have a 340 don't discourage the guy because he's not sure or doesn't know.
Really, you think it is discouraging a guy to suggest he upgrades his car?
What are you gonna make him do if his tires wear out, find sound 45 year old NOS ?

If he wants to keep the 340, fine, doesn't bother me one bit, but he came on here asking for opinions and advice, he didn't come on here saying "hey, I got a 340, would someone like to kick me in the teeth"

And as far as the LA blocks go, a 340 is nothing more then a larger version of the 318, and a smaller version of the 360
When starting from scratch, it makes NO sense to choose a 340 over a 360, just like you wouldn't choose a 318 over a 340