i need help w/duster engine

Bill Dedman said

Wigsplitter, you wrote, "One of you Magnum head guys should pm me about some brand new .600 lift springs I've got for sale."

Magnum heads have stupidly designed valve guide bosses that stick up out of the head far enough that if you try to open a valve more than .530", or so, the retainer runs into the boss and won't allow any farther opening than that. (.530")

In view of that fact, of what use would a .600"-lift valve spring be?

In order to use it, to take advantage of its capabilities, the heads would need to be removed and re-machined to allow the valve to open .600"+ to prevent the interference.

Am I missing something here?????????

Click to expand...

You're not missing anything, you're reading my signature lol. The springs are from when I was going to swap to magnum heads and run a .508 cam which with the 1.6 rockers I think came to like.548, can't remember for sure anymore. I was going to have the heads machined for it all to work but, plans changed(all 4 of my magnums were cracked) I found a deal on some X heads and a 340 so now I'd like to get rid of the brand new springs which MP says can be used with a cam up to .600 lift, MP has springs for magnums with cams up to 500 and up to 600, I was going to be over 500 so that didn't seem like a good plan. Sorry if this seems like a thread jack but I wanted to explain the situation, it's my signature, not something I typed in that post.
Proceed. . .