706 heads

[Cccrst2008]

i have picked up a set of 706 ported and polished heads and they have up graded 2.02 and 1.60 valves and i am under the impression that i will have some ptv clearence with and thing over 220 duration

[kerrige]

What motor and have they been milled?

[demonheavymetal]

My 4.8 came stock with 706s you shouldn't have any ptv issues unless they've been milled way down.

[Cccrst2008]

Well they have the bigger valves in them now but that's what my 5.3 has on it now 862 witch are the same I picked them cause I didn't want to change the compression

[darnie1987]

im running a tr 220 cam, .551 lift, with p&p 706 heads milled .012 no issues running 7.4 rods?

[demonheavymetal]

Im running trickflow 205s pnp with a custom cam .588/.589 lift no issues here