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73–87/91 Chevy & GMC · Suburban · K5 Blazer
Your square body interior, built by hand.
Direct bolt-in seat packages, custom-built door panels, loaded kick panels and premium dash pads with stainless steel accents, all manufactured in Kilkenny, Minnesota. Pick your colors once, then order the whole interior as a package and save 5%, or buy one piece at a time.
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Shop for your truck
Shop by part
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Five series. Limited runs.
Each design runs for 500 sets, then it changes, so your interior stays rare. Every series comes as seats, door panels, or a whole kit.
Road tested
1,274 miles in two days
“1,274 miles. 600+ miles each day not once did I have to move around to be comfortable. I’m sold on this interior.”
Chad Z., on his new interior and TriMax Seating System · Facebook
See the TriMax Seating SystemAs seen at SEMA
Three builders. One interior shop.
Three different shops brought these square bodies to SEMA, and all three chose a Square Body Solutions interior.
The whole interior, or one piece at a time.
Pick your colors once and every part is cut from the same hides, so the grain and stitching match from dash to door.
Best value
Complete interior package
From $4,157 raw / uncovered · save 5% vs. single parts
Upholstered in vinyl from $8,427
- TriMax or bench seat
- Door panels, 2 or 4 door
- Leather or vinyl wrapped dash, or raw OEM-style
- Kick panels, loaded with Kicker speakers or raw
- Leather, vinyl or raw: one material, one color scheme, every part
- Add headliner, rear cab panels and billet upgrades as you go
À la carte
Single parts
From $500
- Seats from $3,800
- Door panels from $2,100
- Dash from $2,120
- Kick panels from $500
- Add matching parts later, same colors
How ordering works
- 01
Design it
Choose your truck, series, material, colors and stitching. The price updates as you go.
- 02
Request a sample kit
Highly recommended. True color and texture are hard to show on a computer screen, and leather looks different in your own light. Request a sample kit or call 507-210-5902.
- 03
We build it
Cut, sewn and fitted by hand in Kilkenny, MN. Most orders ship in 8–10 weeks.
- 04
Bolt it in
Seats bolt to the factory bench mounts. Panels and kicks go in with the hardware supplied.
The shop behind it
Knish Kustomz
Square Body Solutions is the parts line from Knish Kustomz, Dan Knish's custom upholstery shop in Kilkenny, Minnesota. When a build needs more than bolt-in parts, the shop does full custom interiors for hot rods, muscle cars and classic trucks.
12KFacebook followers
90%recommend, 67 reviews
SEMAMultiple builds featured
Photos & video
Casanova on Whips By Wade
View the post on Instagram →
Video feature
Casanova on Ignition Therapy
Watch the reel on Instagram →
Magazine feature
Casanova in All Chevy Performance
August 2026 issue · Read the article →
“Been building custom cars for 30 years. Knish does beautiful work. Anything you can dream up, they can do. Extreme attention to detail.”
“1,274 miles. 600+ miles each day not once did I have to move around to be comfortable. I’m sold on this interior.”
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Get a quote
Tell us about your truck or project. It comes straight to the shop, and we’ll get back to you.
Call 507-210-5902
115 N Vinegar Hill Ln, Kilkenny, MN 56052