340 4 barrel and 340 6 barrel: were they really UNDERrated?

He asked about a particular car and a run that we made.

I also posted the numbers that I recollect from when our
340 cars were Brand New and totally stock except for tuning
of course. Also, the first hand results that I had back then in
my experience after stages of modification.

I am responding for to the question asked by the Original Poster
hopefully to be a benefit to my friends on this site.

It really aggravates me when someone says that the 340s were
only good for 5200/5400 new. Mopar in the ads advertised them
at " 6000 RPMS for under $3,000". They were conservative as they
had to warrantee they for 5 years/ 50,000 Miles.

Ya know:
I was there and owned/raced the 340s and every
other Moar back then. I even owned a couple of Dealerships.

I still do race them and I am even right now at the track racing
three at the Nationals today and am between rounds.



I love A Bodys as much as anyone in the World and
particularly the early 340s. It pisses me off no end, when
I see misinformation disseminated on these cars. I will set
the story right every single time.

I do not ever claim to be any big expert or a great mechanic. Often
I ask for help and advise from my many friends on this site and benefit
from it = a Lot.

However, I have been around and raced various Mopar for way over
60 years and it is my chosen Hobby and I do know a few things about
them.
I think you nailed it when you said tuning, we all know 5btdc and factory tuning, proper performance tuning of ign curve, carb etc really wakes up the 340, or any motor. 300hp @3100 # can net high 12s, 375hp could be high 11s given a good track and driver. You guys must be hella tuners on points back in the day to get 375hp tho, but with fuel back then and considering a more true 320 hp from factory. I can see it. Those were the days!