Exhaust Question

[str8edgec10]

My budget build has fell across something that just seamed to easy to not turn down. My truck has a 350 small block with long tube headers. After getting prices of close to $400.00 for two flomaster's dumped before the rear axle. I typed in flowmaster on craigslist and viola! These were on an 86 C10 swb that had a big block with long tube headers. Will be putting them on tomorrow. Fingers crossed. Does anyone think these will fit or it might just be too good to be true?

http://houston.craigslist.org/pts/4923425808.html