Hi all!
I am looking to either shim the valve springs I have or use a set of manly springs that are 1.800 install height. The manly springs I am looking at have a 165 lb spring pressure at 1.800 and have a 1.324 od. The springs I have now are 1.29 @ 155 lb @ 1.800. Will the manly springs work without modifying the heads?