Opinions on vintage irons?

[Joeyvee]

So you can read my sig and see what kind of irons im working with now. Semi-Old. I've been hitting them ok. Straight mostly. Lots of TINY fade to it. So I've been pretty happy. The shaft is rated 80-94mph. I know with a driver I'm over 105mph. But thats with my driver. So sometimes Ive been hitting my irons WAY left. No hook, just hitting em left. I think I was aligning a little too closed, then coming over the top to compensate and end up pushing left. ANYWAY, I have an OLD Titlesit Pro100 acushnet 4 Iron in my bag. I dont know how it got there. Well I was hitting this thing straight and low and far as hell. It felt amazing. I tried pushing some off left and right and couldnt. Couldnt draw (but I never could) I COULD slice when I tried hard to but even that wasnt as bad as most slices. So... What gives? I'm trying to find a set of these in decent condition just to try on the range. BTW they are steel shafted. Im guessing that may be why the control was better (heavier) and less flex on a somewhat fast swing would help if I was geteting the clubface square at impact properly. where as the softer shafted irons with a TON of offset may be whipping and going way left at impact? I know I need to get fitted. But I don't feel like my swing is 100% grooved right now so i'm just working on that blah blah.