lifter retainers are usually used to stop then rotating

That's a shtload of work, time and money to just get a roller cam in there.

Look forward to seeing how you go. To use the conventional tie bar or retainer you'd have to machine the web of material from between the pushrod bores, all the way down to the specified/required height.

Good Luck. pjz has a billet cam to sell.

It is a load of work but just started
as a query to see if anyone has done it.
Would make an awesome mod.

Roller cams started being used in factory Fords and GMs in 1985, and they made a big jump in power -- even with the emission controlled engines. They allow a much more effective profile. And I clearly remember the talk saying that Ford and GM wouldn't be able to do it correctly, as previously it required special block machining and special parts. But it's just engineering, not black magic. It really works and now most engines have them. It's not just to reduce friction (although it does that) but to get a faster cam profile.

Quote:

The other thing that most people dont understand about power
is that some engines can peak quickly with nothing down low
when others can reach the same peak but with more heaps fatter
graph area all the way to its peak.
Roller camshafts allow so much more valve opening and duration
without overlapping.