Yes, the 263 did come with either solids or hydraulics. I have no idea as to the rime or reason for it. Trans or comp has no bearing either. It seems that what ever lifter was on the table is what the engine got as it was coming down the line. Most, if not all, "moderen" engines have small lifter diamiters, like in the area of .700+, the str8 has 1". Small lifters have to be on the right cam. Big lifters are less fussy. It may be a possiability that lifters could be switched around with no ill effects. I have several of both cams, and have put them side by side, I can't tell a particle of difference. I've put them in blocks and dialed them in, no diff! And!, with only about 40lbs seat pressure, I doubt that lifter and cam pieces are going to go flying if the switch was made. alleycat
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