Grand Master of Awesome Posted June 7, 2011 Report Posted June 7, 2011 So I'm building a 7ac to put into my ae71 with a friend and we figured we may as well do a little bit to make it last a while. 7AFE Block and rods 4AC head = 7AC getting cam reground etc, but just wondering if there's any options for heavier duty valve springs, i know with the 4kc you can use v8 holden motor ones, are 4ac the same or would i need to get some sizes and go through some part bookets? thanks Quote
RollaBus_4agze Posted June 10, 2011 Report Posted June 10, 2011 hey mate... i built a very tough lil 4ac when i first modded my ae82... get in contact with crow cams and they will help you out with valve springs! they custom ground a cam for my engine and supplied it with some double valve springs! should suit exactly what you are after!!! cheers, moe Quote
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