Budget 360 build in heavy car- Which cam?

I would prefer the split pattern; cuz you can move it around some and not loose your overlap window, which with these small cams, is a big deal..
But honestly, with a 3500 stall, car weight for a streeter is not the issue. You got torque multiplication up the wazoo. The bigger deal is gonna be trying to make the tires stick.. The smaller cam has good fuel-economy potential tho.
The best of both worlds would put the 267 intake lobe with the 273 lobe on the exhaust then put it on a 107 LSA, installed straight up.
That would get you more overlap than either of the stockers, more compression degrees with the earliest Ica, and more than adequate Power duration.
This would get you a solid 10 psi more cylinder pressure than the bigger cam, and probably allow you to run a sub-3000 convertor, or the next lower rear gear than you were planning to, and your fuel consumption would get better as well. If you did this, I highly recommend you do the oiling moods from the sticky on the "forums" page, so you can run over 6500 without throwing rod bearings.... cuz it will happily go there