How strokers affect how a cam "acts"

Reading on hughes engines i noticed they recommend when going to a stroker to look 2 cam sizes higher than normal to get the same results. I'm not looking at a hughes cam at the moment but am considering going to a comp solid roller. heres what i got now
340 to 416 stroker
heavily ported x heads
performer rpm airgap
650 proform mech secondary
2400 stall converter
4.10s
32s
this is not for an a body this is actually for a ramcharger 4x4 but i have all the valvetrain components aside from the actual camshaft so i'm going with the roller.
what i'm currently looking at is the xr268R which is 268/274 230/236 at .050 .552/.564 lift
operating range of 2000-6000 rpm. asks for a 2500 stall. now by hughes logic that would act 2 sizes smaller.
so would it be beneficial to run the XR274R which is 274/280 236/242 at .050 .564/.570 lift
operating range of 2200-6300 rpm calls for a 2800 stall.
i'm going to be running 9-1 compression. this will be for hot street use and alot of high rpm use as well.
Don't really care about the negatives of a mech secondary on a truck or running a solid roller in one either i just would like to know if i'm going to kill myself off the line with the larger cam or if hughes is right and that cam would work well for what i intend on doing. I normally wouldn't run a solid roller in a 4x4 but i have the block and heads with brand new lifters,pushrods and valve springs that would work perfect for either cam. which makes this a super cheap route and more power plus i don't mind adjusting valves