Good info here.
How do you guys think this runs over the stock cam?
What pushrod did you use?
I feel like this should be part of a tech page for what someone might encounter using this cam on a rebuild.
My machine shop did shave the heads, but only had to take .007" to get them flat. For cost reasons I went with stock replacement Melling MR927 rocker arms and Melling MPR-471 pushrods (5.475" long). I was a little concerned the pushrod length was going to be way off myself. So I checked the lifter pre-load at the corners (cylinders 1,3,4,6) and got .018-.019" of deflection down into the lifters at each location. I measured at the end of the rocker right over the cup on top of the pushrod, with the cam on base circle. First zeroing the indicator with the rocker shaft loose, then with the shaft hold-down bolts torqued to spec. Any documentation with aftermarket hydraulic cams I could find (mostly from the V8 guys) called for minimum 20 thousandths preload, so I think I just got lucky.
Those Melling pushrods are of the welded ball end type, so the shafts are thicker (I assume hollow tubular). They look way beefier than stock, but weighed within a gram of my factory Ford pieces. The Melling rockers had a bigger oil hole out of the shaft body than the factory ones which I'm hoping with the high volume pump I installed will make top end oiling issues non-existent.
I'd love to hear other's experience with the 410 cam. So far I can't really tell much difference from stock. I went with it as a drop in replacement, and it made the most sense since my use case is mostly daily driver, with some towing, some off road, and a desire for decent mileage. Once installed, idle vacuum is a solid 18-20 psi, and is not lumpy in the slightest. Indistinguishable from stock. From my "seat of the pants" dyno, it certainly doesn't have any more top-end power than stock, though there's a chance it's slightly more "luggable" and harder to kill at low rpm. I'll report back after a more thorough break-in period, but I suspect I won't see much of an improvement over stock until I can add a tune. From watching live diagnostic data, my stock EECV PCM seems to be quite conservative with acceleration enrichment and spark advance.
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