yeah i think the angle looks better anyways... the problem seems to be that the pipe before the tip has to be at the right angle / height before the tip goes on since the tips are just straight anyways. so it's all about the pipe bender's skills
back when i had my '68 dart i took it to a place, i had open headers and two big old cadillac mufflers in boxes lol. and there was a guy he was amazing. he cut/bent /welded all the pipes just they way they needed to go... no leaks, all hung up nice and it took him about 40 minutes. and charged me $130 bucks haha i was amazed
last week i was back in that area, i hadnt been up there for 20 years... that shop is still there