The Magnificent Jon Kaase 520 Boss “UNKL” Mustang

jon kaase boss powered ring brothers mustang

Although “UNKL” is the first classic Mach 1 coming from the Ring Brothers, Mike and Jim nailed it again with this magnificent Jon Kaase Boss powered 1969 Ford Mustang. Unveiled in the Flowmaster booth at the 2019 SEMA show this stallion was one of the most spectacular custom built muscle cars at the event.

jon kaase boss 1969 mustang mach 1

The race inspired widened body coated in awesome BASF Big Boss Blue paint sitting on Detroit Speed suspension and HRE wheels gives the custom 1969 Mustang Mach 1 outstanding appearance. Of course the interior is fully redone, but it has a very clean and stylish look offering comfort at both the race track and the street.

custom built 1969 mustang mach 1 sema

The ‘UNKL” Mustang Jon Kaase built 520 cubic inch Boss motor kicks in 700 horsepower controlled by Bowler built Tremec 6-speed trans and transfered to the wheels by QA1 carbon fiber driveshaft. My man Scottie filmed the Ring Brothers 1969 Mustang Mach 1 at SEMA, so check out the video to see more of this beauty.

You May Also Like Dave Spencer’s 1969 Mustang Mach 1 Multiple Award Winner

1967 ford mustang s code gta

1967 Ford Mustang S-code Now Packs a 429 Cobra Jet

Originally a Candy Apple Red 1967 Ford Mustang GTA, this Stallion is now a totally different animal. I would probably keep this S-code Fastback...
1967 ford mustang gt 390 four speed

Raven Black 1967 Ford Mustang GT S-Code Four Speed

Today we are going to take a quick look at one pristine 1967 Ford Mustang GT born at the Metuchen Assembly plant in New...
1967 ford mustang owner restoration

Impeccable ’67 Ford Mustang | Owner Restoration Story

Gale Zimmerman acquires this 1967 Ford Mustang two decades ago in pretty rough shape. As a former '68 owner Gale was aware of most...
red 1969 shelby gt500 mustang

This Red 1969 Shelby GT500 Mustang is an Eye Candy

The 1969 Shelby GT500 was more of a high performance luxury car, rather then a track ready stallion as its predecessors. That was due...
track ready 1965 ford mustang

Street Legal 1965 Ford Mustang Built for the Track

When Richy heard about a recently imported six cylinder '65 Ford Mustang that was for sale, he went to check it out, and it...
one of one 1965 ford mustang 347 stroker

Menacing One of One 1965 Ford Mustang 347 Stroker

Outstanding 1965 Ford Mustang Resto Job! I know a lot of people like their classic Mustangs as original as possible, but you will have to...
cammed 460 big block ford mustang sound

Cammed 460 Big Block 1968 Mustang Sounds Awesome

Purchased as a project car a little over 3 years ago, this Pro Street 1968 Mustang Fastback fitted with a 460 Big Block V8...
blown big block ford mustang

Big Bad Blown Ford Mustang Pro Street Beast Video

After the most iconic Ford Mustang body style was redesigned in 1971 the next generation Mach 1 Mustangs never became so popular, but this...
427 fe big block 1968 mustang fastback

427 Side Oiler 1968 Ford Mustang Flexing Muscle

Super clean 1968 Mustang Fastback powered by the mighty Ford 427 side oiler engine, what a fascinating combination! The pony is painted in beautiful...


Story of The Ford Mustang Zombie 222. Growing up in the hills of North Carolina where in order to be cool in school you must...
jac roush drives his 1969 mustang boss 429

Jack Roush Having Fun with his Boss 429 Mustang

Jack Roush bought this 1969 Ford Mustang Boss 429 for $1,100 back in 1971 from an young fella who blew the engine while drag...