Stockish 340 upgrades, cam needed

Garrett
I do not see a 264 506 cam in my recap which cam?
I'd leave LCA till we know compression
where did posters get 10.5? I did not see that
heck with 9:1 I might go 108 to get the intake closed earlier but would also depend on how much spread
With 10.5 I might go 114 like momma mopar did in the first place - that would cut the pressure
remember the stock 340 cam is
340 cam 279 210 .429 2899206 intake @.006
so 264 (so given that a lot of that duration is on the long slow close side going 15 degrees shorter for both sides is a bunch- pick how much earlier that 264 cam would close earlier than the 279 stocker (both at .006) I think you would have all them DCR the motor could handel at 110 or 112
Reading Aj I think 165 Compression would be a low target but some canmake 200 ish work- and that's what makes a motor feel snappy
or we could get Aj to calc all the dynamic compression variables
I'd still feel better if the heads were cc'd

KO a higher rpm high compression motor can use a longer duration lobe
none of the lobes mentioned are "fast rate"
this is a fast rate chevy lobe followed by a standard rate MOPAR lobe
..................006.020.050,200
3HF213307 260 237 213 127 0.307 Aggressive .842
Howard.. 261 238 214 134 0.329 standard .904 lobe
here we are trying to use some of his head flows
The rattler is a marketing gimmick, so is the Thumper even n a low compression late 440 or 400 or 360 you can easily do better
I do not think I made any suggestions in this thread- still waiting for OP to verify mfg head cc- not like I don't trust them

another pair
Howard 267 213 ,450 Street Farce 2 .842 lobe
Howard 267 213 ,502
I already compared the Rattler

too swift a close requires more spring or bounce beats the **** out of your valvetrain comp 268 vs Lunati 268 prime example