So now that maybe my foot is out my mouth, I was mainly posting here since you said you hadn't seen an el camaro before to give you a little info. Lauren engineering makes 80's camaro IROC styled fronts. Their most popular looking rear upgrade is the roll pan with the 4 zr1 vette style lights, which is along the lines of what I meant by the rear doesn't have to look like the vehicle the front is borrowed from. This is an el camino trait. Several people have swapped real 80's IROC fronts, which looked better than the kits, being that part of the fenders are swapped & nose looks aren't compromised just to fit..
Besides the overhaulin show 67 front swap, pretty sure I saw pics of a 69 front swap, which I liked better.
Not quite camaro, there have been quite a few trans-am front swaps done to 2nd ,3rd , &4th gen elco's. My first custom front was a simulated 77'trans am look.
Later did the 2010 camaro nose in late 2009'. It got damaged by someone cutting me off in traffic 3 years ago, which made me decide to update to a 2016 front. That's why I had 3 different fronts in 25 years on the same vehicle.
Now the biggest reason I posted to you. If you really like front nose swap of any sort enough to want one, & have some metal, fiberglass & bodywork skills, I'm one of the most qualified ( crazy enough) people to advise you on such a project.