906 vs 452 heads on 440

Iron heads are not fun to do. Aluminum heads are highly recommended over porting iron heads. This is an estimate for the price you'd pay for the service and the approximate flows you get for working your 906 iron heads in our shop. Bronze guides, hard exhaust seats, new stainless steel valves, valve job, balanced combustion chambers, heads surfaced and porting to the level indicated.

Seals, retainers, locks, locators and springs are an extra.

260 cfm @ .500" lift.........................................................................$1,400
275-280 cfm @ .500" lift..................................................................$1,850-$1,900
290 cfm @ .500", 310 @ .600", 321 @ .700"...................................$3,100
299 cfm @ .500", 325 @ .600", 335 @ .700", 340 @ .800"..............$5,100

346, 902, 452 heads will not flow to the cfm listed in the upper ranges of the 906 heads.

Oh, and I have cleared out some space in my conversation box for those of you who were unable to reach me.