Blazer is killing me
 

97 blazer 4.3 4 Dr 4x4 auto power under 150k........
I got this truck and paid 2500 a few years ago. It had low miles, 4x4 and ran good when it was test drove. It had sat for ten years, at the time I didn't realize that all rubber would need replaced meant ALL rubber... I drove about a thousand miles before fuel pump went out. I had it towed where it sat half done over the next year maybe a little more. I had to move suddenly and threw everything on my shop floor into a box(tank and fuel pump and filter out) took rear driveline out for towing then took it across state and reassembled and fixed u joint, new fuel pump(might have ended up with a pump for a 96 if that does make a difference). Rean without fuel pressure sensor on fuel tank as it broke and I couldn't spring for the 50 at the time.... the truck fired right up. Had the same noisy belt since before the fuel pump when the serpentine belt was replaced. Everything was going smoothly just a bit loud. As I pulled up to my place, no hot rodding, no overheating, I did notice oil pressure slightly Hightower than normal and planned to check oil. As I almost get stopped there is a loud bang and it runs still but it sounds like a huge exhaust leak in engine bay. It would drive but with how loud it is Im scared to cause further damage. Im screwed at this point aren't i? And I haven't checked yet leveled out but oil might be low which it had never really leaked and I did run a couple weeks without checking. 😬
update....im an idiot and somehow a spark plug was out....yes...attached at the boot still... problem solved.