MustangWorks.com : Ford Forums - View Single Post - My NEW replacement Holley heads are different!

Rick 91GT · 04-20-2001, 09:02 PM

Well I was on the phone with Holley today for about 25mins, they heads I received are correct 300-575 2.02 x 1.60 vlaves 17 degrees. The only thing the guy could come up with was maybe the last set of heads I received wer the 300-579 stamped wrong these are 2.02 x 1.60 20 degree heads. The 17 degree heads will put the valve in a differnet positon with the piston so that is why there is high clearances. After fly cutting I have .315 on the exhaust and .230 on the intake, plenty of clearance with my Anderson beast. The fly cutting also gave me a little more clearance on the outside edges of the eyebrow for extra insurance.

Sorry to hear your heads look bad they are AFR assembled per conversations with Ed Curtis. Ed told me he would pick the heads over the E'brocks, TFS, Windsor or any FMS heads, but he still favored the AFR's. I would say keep them they are a good head. I run the Crane Blazer 1.6 rr and they are nice pieces $200 from Jegs or Scummit. According to Holley Tech these heads are the new standard head to come with the kit due to the great flow numbers they have and are good for 15+hp over the other heads. Mine looked great but I did have to port match them to the lower manifold, there was a 1/8 step on some, I cleaned up all the intake ports and fully polished the exhaust ports and chambers. I bought the 1262 and they work very well with the large ports of the Holley's. I really like my Holley heads I just wish I knew what I had last time around

. Well if your Dads are the same as mine they should work with stock pistons, I am running .544/.568 with 224/236 duration now and I have no problems at all. What am did he go with?

I got the long block built today, I'll drop it in tomorrow and get the rest of it together, then next week its tranny rebuild time and the gears/rear will have to wait till next month. My baby should be alive next weekend I can't wait, it has been so long...12 weeks!

------------------
Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon!

[This message has been edited by Rick 91GT (edited 04-20-2001).]

04-20-2001, 09:02 PM	#4
Rick 91GT Procharged! Join Date: May 1999 Location: Hanover, PA Posts: 1,539	Well I was on the phone with Holley today for about 25mins, they heads I received are correct 300-575 2.02 x 1.60 vlaves 17 degrees. The only thing the guy could come up with was maybe the last set of heads I received wer the 300-579 stamped wrong these are 2.02 x 1.60 20 degree heads. The 17 degree heads will put the valve in a differnet positon with the piston so that is why there is high clearances. After fly cutting I have .315 on the exhaust and .230 on the intake, plenty of clearance with my Anderson beast. The fly cutting also gave me a little more clearance on the outside edges of the eyebrow for extra insurance. Sorry to hear your heads look bad they are AFR assembled per conversations with Ed Curtis. Ed told me he would pick the heads over the E'brocks, TFS, Windsor or any FMS heads, but he still favored the AFR's. I would say keep them they are a good head. I run the Crane Blazer 1.6 rr and they are nice pieces $200 from Jegs or Scummit. According to Holley Tech these heads are the new standard head to come with the kit due to the great flow numbers they have and are good for 15+hp over the other heads. Mine looked great but I did have to port match them to the lower manifold, there was a 1/8 step on some, I cleaned up all the intake ports and fully polished the exhaust ports and chambers. I bought the 1262 and they work very well with the large ports of the Holley's. I really like my Holley heads I just wish I knew what I had last time around . Well if your Dads are the same as mine they should work with stock pistons, I am running .544/.568 with 224/236 duration now and I have no problems at all. What am did he go with? I got the long block built today, I'll drop it in tomorrow and get the rest of it together, then next week its tranny rebuild time and the gears/rear will have to wait till next month. My baby should be alive next weekend I can't wait, it has been so long...12 weeks! ------------------ Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,24#,76mm C&L,Full MAC exhaust 1-5/8" Long tubes,2-1/2" O.R H-Pipe,2 1/2" cat back, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension,S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,4:30's and 31 splines coming very soon! [This message has been edited by Rick 91GT (edited 04-20-2001).]