Street Cruser

John, you can click HERE to see a Ford rail rocker arm. Imagine if our engines had pedestal-mounted rockers and they had guardrails on either side of the valve-side rocker pad cradling the valve-tip. Rail Rockers. It's an efficient setup. I had a '66 Mustang (289, 4-spd) with them years ago - and today, I'm going to use the same 289 valves in my Mopar - Kinda crazy... The tip-lengths on the rail-valves are .365 vs .240 for the non-rail ones. A little extra cushion, otherwise, no difference.

I went with Elgin's I-1670 & E-1669. I'll back-cut the Intake but install the Exh as-is. We'll finalize the spring & retainer selection once everything is measured but hoping for 280# from a beehive or canonical spring or #300 without (recommended by OCG).

Thanks for all the extra details (as always!), much appreciated @my68barracuda