Question, since there is a patch for the PC version that fixes a few things in levels, I have been unable to preform some level tricks like in the 2nd level... the jump on the slope at the start got even more pixel perfect...

Would it be wiser to run the game in the original unpatched version?

Hmm what patch do you mean and what version do you run? I have it as retail and GOG version and all glitches can be performed there. You can also check ingame with pressing "f10" then typing "version": Most people (if not all) played the "Jan 28 2000, 07:53:27 Release".

https://patches-scrolls.de/patch/2185/7/26464 -> That one. My original boxed copy is on an older version IIRC.

Edit: this is the changelog:

version 1.2

company: LucasArts (www.lucasarts.com)

Corrects: This update incorporates Update 1.1. Installing this update will solve problems regarding RETURN TO PERU and catching that rascal Volodnikov in NUB'S TOMB.

 Possible failure of the control configuration dialogue box to function properly has been
 repaired.
 Possible failure of all levels to open properly and to display the correct field of view when
 they do open has been repaired.
 Possible failure of Infernal Machine Part sounds to end properly when the parts are put
 away has been repaired.
 Several important action and display anomalies have been resolved in the following levels:

 BABYLON
 SHAMBALA SANCTUARY
 V.I. PUDOVKIN
 MEROË
 NUB'S TOMB
 INFERNAL MACHINE
 AETHERIUM
 RETURN TO PERU

Notes: After installing this update, you must start (or re-start) the updated level from the end of the previous level of the game. The "start_XX_LEVEL.nds" savegame, which is automatically created when the level first opens, will no longer be valid.

Continuing play from ANY savegames made prior to installing an Update may produce erratic results.

Source: https://www.myabandonware.com/game/indiana-jones-and-the-infernal-machine-amk

That's the normal 1.2 patch. As Molotok already said, most people use this version. And for me, all the tricks and glitches that are listed here in the forum, are working with this version.