Mixed Info About Pushrod Clearance - am I too close?

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Apr 28, 2026 | 12:05 PM

OtakuFather

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Mixed Info About Pushrod Clearance - am I too close?

Hey all -

So I have perused this forum and others online and I want to be sure, before I button this engine up and install here in the next few months that I am not making a mistake. I bought and installed thicker pushrods, but the clearance is very tight. Below are some details and images to help with opinions.

Info:

Full engine rebuild, bottom-end just back from machine shop, I put together top-end - fully upgraded rockers (better trunnions), new single springs, valve stems, valves etc.
Mild cam installed - duration @0.050 I/E 220/222 | Intake center line 110 | Lobe separation angle | Rocker ratio 1.7 | Valve lift (in.) 0.570 / 0.570

I elected to go with a sturdier pushrod, but fear I may have gone 1 step too large. Pushrods are 3/8 diameter w/0.080 wall. The motor is on a stand now, so if I have to swap out with a thinner pushrod, I have time, but want to be sure before I gear up to install the motor. Let me know thoughts, thanks in advance all!

See pics below, let me know what you think.