Edelbrock makes a 1 3/4 primary header for the 350 TPI's that would be a V-Nice compliment to yout 86 305 TPI engine.
The problem with that link is that the larger headers should have SMOG pipes on them and this set doesn't. It could be the "smaller" TES system, or it might have been modified. TES systems are over $500 new so if the cat is included and no parts are defective ,.............
I'd ask a lot of questions before making an offer.
