I would think in something that held tune, like stays in the same elevation and basic weather that any stainless would be fine, the eddys included. If you drive all over...and it's a ragged edge motor, I like the nitro's. Btw I milled them .025..so you should be right at 65cc...along with Paul's, the 273 heads from the thread. I also bought new valve stem seals for the both... because on his they did pfte comp seals, the white one..I gave up on those. They wear the stems and dont hold oil back better than other anyhow. Yours were black...but didnt say viton anywhere..So without 2nd thought...you now have trickflow vitons. #tfs 52400454. To those reading-The 522-16 is the number for 3/8 .530. They showed up yesterday. If I wouldn't choose them myself, i dont use them on others.
Btw I picked up a kwikway setup. I need a facer now.
Another thing.. the coated nite valves would require clearance in the guides, they barely fit. ..which lends another thought. That they may be a good drop in and a refresh wear the guides are broke in and on the .005-.008 side.
Since I'm typing I went ahead and took my brother-in-law's 318 heads back after checking the guide clearance on them and found .006 int and .008 exhaust ..roughly up to as much as .009
I set them right in front of the owner, hooked up my dial and mag base, 90's to the stem...and said see...
He said he would fix immediately and began yelling across the shop. I check everything, that's what you get with me.
I've realized I'm kind of perfectionist.
I edited this, had the #s switched.
