340 or 408?

Here are cam timing numbers for three different engines. Same bore, different stroke.

4.04 bore
10.5:1 compression
3.313, 3.79, 4.0 stroke
6.123 rods

The only change is stroke length. The effective compression ratio is the same for all three at 8.75:1.

I'll post the 3.313 stuff first. Then 3.79 and 4 inch. Cam timing numbers will be @ .006 lift, .020 lift and .050 lift with lobe lift and valve lift with a 1.5 rocker in that order.

3.313 stroke:
296/287/255/.430/.645 intake
306/297/265/.430.645 exhaust
The open/closing events are as follows:
IVO:46
IVC:70
EVO:81
EVC:45
OL:91

3.79 stroke:
302/293/261/.433/.650 intake
316/307/275/.430/.645 exhaust
The opening/closing events are as follows:
IVO:48
IVC:74
EVO:89
EVC:47
OL:95

4.00 stroke:
304/295/263/.450/.675 intake
320/311/279/.453/.680 exhaust
The opening and closing events are as follows:
IVO:48
IVC:76
EVO:90
EVC:50
OL:98

The same everything except stroke length. This is for peak torque at 5000 and peak power at 6500. If we moved the RPM up to say 7200 the numbers would diverge even more.