Im building a 540 with afr 265 heads and was needing advice as to how far i can go with cam selection im looking at 239int, 247ext around 650 lift will gil exhaust be alright with that thanks

Heads seem kinda small for a 540.

Are the Gill's Dry ?

Stay on a 112 or 114 Lsa and you'll be fine. I like the heads but any particular reason on that CI. With that cam duration and runner volume on a 540 I'd think you'll make peak hp close to 5,300 or so depending in induction. Lot of 540 builds out there with 310-320 runners with a little more duration.

What's it going in?

Those are the heads i got it was going to be 502 but got into it and decided to rebuild it and may as well get the cubes 265 afr is small but flow very well im hoping it will work good, no the gils are stock hp500 short style and its a baja outlaw 25 thanks for the help, i also have a cam laying around thats 228int, 234ext, .600 .570 on 112 but was thinking it was too small it also has factory dart intake and carb

Personally I think you'll have a nice build. Won't be lacking torque that's for sure. I've used those heads ported on a marine build and they were awesome. Boat pulled extremely hard.

PS my vote would be first choice on cam. Heads will do well with it. Should be more builds like this. Simple and very effective. Cheers!!!

Im hoping it will make 625ish hp and a bunch of tq do you think the gils will be ok with the first cam choice

What power did you have before? What drive is behind it? I have zero tech value to add, in just curious about other's projects.

Its has a bravo 1 with hydraulic steering it was originally an hp500 carb

Just built a 548 with a little smaller cam and steel heads made 621 hp and 675 lbs. torque. Should be no problem.