[mikey]

My Crower Cam needs a minimum of 10.25 to 1 Compression Ratio which means I need my AFR 210 heads skimmed to 58cc.

Contacted AFR and there is no problem in milling to 58cc but this needs to be an angle mill. Apparently the heads are spot faced, so there should be no problem with the head bolt seating, but I am worried about rocker geometry and push rod length.

AFR have said dont worry just mock it up when you get it and it may need releiving for the push rods and a different length of push rod.

I really do need some help from you guys with experience as this has frightened me to death , especially as I dont have loads of money to waste and if I get it wrong.......

Firstly is it easier than it sounds and are different sized push rods readily available off the shelf. Also should the rockers be OK - I am using roller Rockers with solid roller cam.

The other question is am I complicating things. The cam is a Crower 00427 290R which asks for a minimum CR of 10.25 to 1.
I can get 9.5 to 1 with parallel mill, so is the CR that important if I am using the car on the street.

Honestly I would be very grateful for your advice or comfort especially if you have done it as the implications following angle milling really worries me.

Anything else to watch out for

Thanks in anticipation of your help.

A very worried Mike.