55.2-59 1956 truck build help

[justin5976]

I'm not a typical builder or fabricator, I'm doing this for fun and seeking help when something is out of my comfort level. I have a 56 3100 short bed that I'm doing a frame off restoration on. My issue is I have what appears as a second gen camero sub frame grafted on my trucks original frame. I plan on making a restomod that I want to take on road trips, classic look but modern updates with an LS engine etc. My concern is if this front clip was done right, the welds look ok and everything looks soild and done by someone with some knowledge but have general concerns that if I build my truck off this foundation that later on I will find that something is out of square or otherwise messed up. Does anyone have any ideas on what I could measure or check to reassure my concerns? I would hate to have to look for a new frame then buy a mustang II or similar front suspension if I dont need too. Thanks for your help