Uh, yeah ...
It was designed for all the smog emission equipment that came out in the
70s. The Olds 403 is like the Chebby 305. It gets you from point A to
point B but not in any performance oriented way. People have been able
to mod the Olds 403 but dollar for dollar you are better off with a
different engine. The Olds 403 was choked off with dinky little intake
runners and valves.
I recently had to make the same decision as I was looking for a 79 TA.
I too found the HP numbers you referenced and that was a factor in my
decision to get the Pontiac 400. The clincher was that I decided to go
for a 10th Anniversary Edition and I wanted an manual tranny so I had no
choice but to go with the 400 as the manual models all had the 400
motor. According to the info I found 79 was the last year that the
400 motor was available. That should help the car maintain/increase
its value as well.
After driving the car I'm very happy with the choice I made. The 400
has a helluva lot of power and it's a blast to drive. It's fun to be
driving a manual car again after a 6 year absence.
So I can't compare the two but I can say that the 400 seems to be a
Hope this helps a bit.
the pontiac 400 is the more desirable car, and motor for that matter, the olds
403 is not a bad motor, just a basic passenger car motor made to pass tough
emmissions, as far as value and dersirablity the poncho wins out, and
especially for modifiying, the 403 is not a choice motor for upgrading, its
been done, just not worth it in my opinion, the 400 is essentially the same
motor they been putting in GTO's in the late 60's, the've been choked up a lot
by the late 70's but their is a huge support for aftermarket pontiac stuff and
lots of performance potential from a 400, now stock may be your thing which is
fine, but the pontiac will be the way more sought after car, and in 79 your
only choice with a 400 would be with a 4 speed, if it aint, its not original
79 T/A WS6 455 ,Hurst 4 spd, Blk w/ t-tops, Heavily Fortified, 4mpg
00 Ram 2500HD QC V-10 4x4,Blk,5 spd,4:10 LSD, 10mpg
98 Intruder 1400, Blk, 5 spd, 25mpg
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