Good 340 Resto Cam

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I have a 1969 340 GTS that I am restoring and looking for a good camshaft that will give me some extra performance. Running stock heads and carb and 2 1/2 inch exhaust with stock manifolds. Wondering what anyone could suggest for a good performing cam for me car...thanks so much.

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You never noted actual compression!! If high compression (9.5-10 to 1) the longer duration cam
would be good. Low compression (8.5 to 1) smaller
duration cams are best.

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all I can tell ya is I had the MP 340 grind cam in my old 340 swinger, that thing was a DOG. it was done at 5k.

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The timing events (duration) was moderate, matched
to the heads, I guess. Unless you are sure of the actual centerline (degreed in) you cant say it's a dog. A lot of factors do come into play (head/block milling, cam phase, line boring of mains/cam bores, etc.) when setting the cam up for optimum performance, even if it's stock (line up the dots method too).

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all I can tell ya is I had the MP 340 grind cam in my old 340 swinger, that thing was a DOG. it was done at 5k.

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The timing events (duration) was moderate, matched
to the heads, I guess. Unless you are sure of the actual centerline (degreed in) you cant say it's a dog. A lot of factors do come into play (head/block milling, cam phase, line boring of mains/cam bores, etc.) when setting the cam up for optimum performance, even if it's stock (line up the dots method too).

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all I can tell ya is I had the MP 340 grind cam in my old 340 swinger, that thing was a DOG. it was done at 5k.

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The timing events (duration) was moderate, matched
to the heads, I guess. Unless you are sure of the actual centerline (degreed in) you cant say it's a dog. A lot of factors do come into play (head/block milling, cam phase, line boring of mains/cam bores, etc.) when setting the cam up for optimum performance, even if it's stock (line up the dots method too).

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plusssst on all that. Done plenty of dot to dots and never had an issue. The car had fresh 9.5:1 .030 over 340, ported J heads, bigger valves, 1.6 roller rockers Air gap intake, 2800 stall, TTi 3 step exhaust w/ X-pipe and 3.55's best it could do was 13.82 w/ a 750DP....14.20 w/ a carter 625. Same set-up w/ a BB and the car wold have run low 12's.

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Not to say you're wrong, combo is right, but you
could have gone to a 3.90, 4.10 would have been
better. But I don't know your driving intentions
are, or if it's a dual purpose ride. Usually with
good heads and big valves, a motor wants to breathe easier as the rpm's increase, cam depending. Lower gears might have helped it to
"get there" quicker (powerband) and net you a better et, but mph may take some pony power on the
big end. It's a balancing act, with
torque and horsepower.

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all I can tell ya is I had the MP 340 grind cam in my old 340 swinger, that thing was a DOG. it was done at 5k.

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The timing events (duration) was moderate, matched
to the heads, I guess. Unless you are sure of the actual centerline (degreed in) you cant say it's a dog. A lot of factors do come into play (head/block milling, cam phase, line boring of mains/cam bores, etc.) when setting the cam up for optimum performance, even if it's stock (line up the dots method too).

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plusssst on all that. Done plenty of dot to dots and never had an issue. The car had fresh 9.5:1 .030 over 340, ported J heads, bigger valves, 1.6 roller rockers Air gap intake, 2800 stall, TTi 3 step exhaust w/ X-pipe and 3.55's best it could do was 13.82 w/ a 750DP....14.20 w/ a carter 625. Same set-up w/ a BB and the car wold have run low 12's.

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Not to say you're wrong, combo is right, but you
could have gone to a 3.90, 4.10 would have been
better. But I don't know your driving intentions
are, or if it's a dual purpose ride. Usually with
good heads and big valves, a motor wants to breathe easier as the rpm's increase, cam depending. Lower gears might have helped it to
"get there" quicker (powerband) and net you a better et, but mph may take some pony power on the
big end. It's a balancing act, with
torque and horsepower.

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all I can tell ya is I had the MP 340 grind cam in my old 340 swinger, that thing was a DOG. it was done at 5k.

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The timing events (duration) was moderate, matched
to the heads, I guess. Unless you are sure of the actual centerline (degreed in) you cant say it's a dog. A lot of factors do come into play (head/block milling, cam phase, line boring of mains/cam bores, etc.) when setting the cam up for optimum performance, even if it's stock (line up the dots method too).

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plusssst on all that. Done plenty of dot to dots and never had an issue. The car had fresh 9.5:1 .030 over 340, ported J heads, bigger valves, 1.6 roller rockers Air gap intake, 2800 stall, TTi 3 step exhaust w/ X-pipe and 3.55's best it could do was 13.82 w/ a 750DP....14.20 w/ a carter 625. Same set-up w/ a BB and the car wold have run low 12's.

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Not to say you're wrong, combo is right, but you
could have gone to a 3.90, 4.10 would have been
better. But I don't know your driving intentions
are, or if it's a dual purpose ride. Usually with
good heads and big valves, a motor wants to breathe easier as the rpm's increase, cam depending. Lower gears might have helped it to
"get there" quicker (powerband) and net you a better et, but mph may take some pony power on the
big end. It's a balancing act, with
torque and horsepower.

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yeah bigger gears and more cam would have helped, I got the car done and it was a nice driver. Just thought it should have pulled a little better. hey 17mpg at 70 'aint bad either. If I did a 340 it would get more cam...that's all.

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17 MPG is NOTHING TO SNEEZE AT. It's really GOOD
for 70 mph!! As far as STRONGER, more EFFICIENT hydraulic cams that CAN PULL to 6k or better,
they're out there. Just be realistic on the rpm you want to turn in high gear, and you will be okay my friend!! Good combo, though!!