just installed a gm crate 350 need muffler selection help

[NCD1966]

I have a 1984 chevy sliverado which i drive daily.

the original 305ci (110,000 miles) was showing its age. And i need more pulling power to pull my tractor every once in a while.

Jegs had a new gm 350 crate motor for $1500 bucks, I figured thats a cheap way to keep the truck rolling with more pulling power.

suppose to make 260hp and 350 lbs-tq with headers and 4bb carb.

So i have some 1-5/8 hookers i bought 6 months back for either one of my trucks. Bought them off a guy at the drag strip, a fair deal for almost new.

i have some summit 3" race mufflers (free mufflers) coming off of 1 foot of pipe just to break in the motor and get the truck to the exhaust shop. (freaking too loud)

Plan on doing 2.5" from the headers all the way out the back.

I want something thats quiet but has a little sound. I was looking at some long case magnaflows and the walker quiet flows.

I dont want any interior noise, just would like to hear a little bit of tone.

also i would like it to be quiet while crusin the highway. I probably will do some dynomat in the interior later on.

Any suggestions or experience with the mufflers I listed?