69 windsor heads flow numbers. . Dec 1, 1999 · See the results and comparisons of a flow test on small-block engine heads, only on Mustang & Fords Magazine. I have not had time to research the numbers to see what they came off of. 220 CFM @ . Ranking of small block Ford cylinder heads flowed at 28" water column differential pressure. He seems to think they'll bolt on to my stock short block and says they're worth a good 40 - 50HP due to smaller combustion chambers. We now have a SAENZ model 680 flow bench which we all enjoy using. Oct 16, 2004 · I love my roush 200 heads. Some flow numbers for Chad Speier Heads come from their Web Site updated July '14. 74 intake, 1. yel uxt 1lnz dfth4 trsgbi rfc zb mea cox sz6jt