Upside down Inlet camshaft

Just changed the HG, as mentioned in another thread, but I have a nagging thought that I've refitted the inlet camshaft gear 180 degrees incorrectly.



I had to turn the shafts, to gain access to 2 head bolts, & everything went well, but.....



Head back on, & engine rebuilt, apart from inlet manifold. I turned the crankshaft by hand, & timing marks all line up perfectly, & everything felt smooth.



If I'd messed up by 180 degrees, would I feel resistance of valves hitting pistons, & jamming?



After the gears were off, I noticed that the previous HG repair guy had marked the pins, & corresponding slots, with tippex, but I can't remember if they both were both corresponding when I dismantled :-/



Is there a way to check if it's right without stripping the engine back down, before I start the engine?



It's been a L O N G day!

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