Looking at a few lobes for my 512 build.
Take a look at the lobes and see which one(s) you like as far as a mix of power and durability. The cam is going in a street car that will see 1k or so a year on the street, so durability is a concern.

Bullet .875

310 Adv [Email]272@.050[/Email] [Email]182@.200[/Email] .3910 lobe lift .016 lash

Bullet .904
302 272 185 .4000 .009


Comp XTQ
298 272 184 .392 .018

Comp XX
304 272 182 .406 Lash not given

Ultradyne NF.842

299 271 182 .3934 .016

Engle

272 182 .408

FWIW, the Bullet tech told me the Bullet .875 lobe listed above would be a poor choice, as its shown for a flat head.

Combo is a 11 to 1 512,
Ported BS heads,1.58 rockers, Vic Jr, 950 carb
3900 lb car, 3.73 gear.

Im leaning towards the Comp XTQ, Bullet .904, UD NF .842 or Engle but looking for opinions