Headers vs 340 manifolds

For me. Post count jumps from 187 to 191


A 1-5/8 header I am going to assume.

Yea yea, 100%, don’t dig. Not worth the time.


Sorry, did I say it’ll jump to 370 hp?
Because you keep saying this. As if I said it.
OEM rated it at 275. You just told me above it dyno’d 326.2 hp.

Lets drop the .2 and do some math;

326 - Your dyno run
- 275 - OEM published power
= 52 hp - with a new carb and headers.

The old rule of thumb was said to be 20-25 hp. Just headers.
New carbs were always worth more. I never heard the old timers say “XX” HP gain. Just runs better.
Same with camshafts.


Ditto, With respect right on back.
For me. Post count jumps from 187 to 191


A 1-5/8 header I am going to assume.

Yea yea, 100%, don’t dig. Not worth the time.


Sorry, did I say it’ll jump to 370 hp?
Because you keep saying this. As if I said it.
OEM rated it at 275. You just told me above it dyno’d 326.2 hp.

Lets drop the .2 and do some math;

326 - Your dyno run
- 275 - OEM published power
= 52 hp - with a new carb and headers.

The old rule of thumb was said to be 20-25 hp. Just headers.
New carbs were always worth more. I never heard the old timers say “XX” HP gain. Just runs better.
Same with camshafts.


Ditto, With respect right on back.
340s are rated 324 nhra stock
You know better then using 275 thats a bs rating even dantheman knows that.
The dyno pull is right in front of you its 17 hp on a stock motor
35 40 on a built motor 70 on a stroker its all been tested
lmao @ 275 stock 326 with headers carb