What valve springs should I use?
I have a 1973 model year 360 short block out of a camper with 80k miles on it that I put a Summit 50052 cam in. I am using the heads on another engine and got ahold of some magnum heads off of a 98 318 that I would like to use on this 360. The new lifters have holes for pushrod oiling and I know I will need custom length oil-through pushrods. Lift of this cam with 1.6 magnum rockers should be around .484". This is a for fun budget build and I was wondering if the stock springs on these heads would hold up to this combo on the street as a flat tappet cam can have less spring pressure than a roller I have read. If not, what springs would be sufficient? I have not called anyone on this yet.
I have a 1973 model year 360 short block out of a camper with 80k miles on it that I put a Summit 50052 cam in. I am using the heads on another engine and got ahold of some magnum heads off of a 98 318 that I would like to use on this 360. The new lifters have holes for pushrod oiling and I know I will need custom length oil-through pushrods. Lift of this cam with 1.6 magnum rockers should be around .484". This is a for fun budget build and I was wondering if the stock springs on these heads would hold up to this combo on the street as a flat tappet cam can have less spring pressure than a roller I have read. If not, what springs would be sufficient? I have not called anyone on this yet.