what all needs to be done to a stock evo 8 head for it to be safe to run 280's and rev to 8k.

 

send it to headdynamics.com. or pm him he is on here HEADDYNAMICS.

 

Ti springs & retainers, super strong timing belt. Not sure what else ....

 

+1 springs and retainers, and possibly bronze valve guides

 

is there a big difference from running 272/272 or 272/280?? power gain wise?

 

bump what he said is the a big diff between 272/272 272/280 or 280/280

 

There's a big difference between 272's from one company and another. HKS vs. Tomei for example. Same goes for 280's. All 272's won't perform the same, and some need upgraded valve train. Same with the 280's.

Some 272's will outflow other 280's, so it's hard to draw comparisons like that.

 

How are the JUN cams?

 

nothing, I do this all day.

 

just call the company and ask them what they recommend. probably will just be springs and retainers

 

For what?

 

The best port work around by far.

 

haha me too

 

arp head studs

 

So stock valves won't ever float and bang on pistons, head gasket won't blow, timing belt won't skip if he hits the 8k rev limiter.

Ok.