If it makes you feel any better, I had the same experience when installing my TA Performance Single Row Timing Chain / Billet Steel Timing Gears with tensioner.
The chain definitely did need some coaxing to go onto the gears.....seemed way too tight for my comfort, but I finally did manage to get it on. I had the chain tensioner installed, before I attempted to install the chain as well.
Since all chains will stretch somewhat with their initial use, I guessed that the little stretching that would naturally take place as the new set up had some run time should take care of things, putting the chain in a little more relaxed condition. I did take it real easy for the first few hundred miles though.
Overall , it's a great product / set up. I must say that it runs very quiet. I am very happy with my choice to buy / install this product & would highly recommend it to anyone needing to change over their timing set.
dave