BOSS 429
- Thread starter kbelusa
- Start date
RogerC62
Founding Member
I'm pretty certain the shock towers were physically moved outboard along with the lower suspension mounting points. Boss 429s have a wider front track than other 69 & 70s mustangs. Kar Kraft of Brighton, Mi. did the modifications to the cars back in the day. I've not seen any specific details in writing of what all was involved. I would check around the net for a Boss 429 forum or registry and ask around.
Dark Knight
Founding Member
This is what I ound on a quick search
Kar Kraft faced considerable obstacles in the development of the Boss 429 Mustang, including the fact that the engine bay was over 2 inches too narrow for the motor! This was solved by moving the entire suspension out a full inch on each side. This required new reshaped shock towers, widened strut tower brace, redesigned top and bottom suspension arms, redesigned heavy duty uprights, and heavy duty springs. Also a smaller new power brake booster was needed to clear the big engine valve cover. The battery was placed in the trunk to improve the cars weight distribution; also the cars rear suspension was beefed up with staggered shocks, heavy duty springs, and a thick rear stabilizer bar. The car sat an inch lower overall than a stock Mustang did, so a special "short" front spoiler was designed to fit the clearance available.
Kar Kraft faced considerable obstacles in the development of the Boss 429 Mustang, including the fact that the engine bay was over 2 inches too narrow for the motor! This was solved by moving the entire suspension out a full inch on each side. This required new reshaped shock towers, widened strut tower brace, redesigned top and bottom suspension arms, redesigned heavy duty uprights, and heavy duty springs. Also a smaller new power brake booster was needed to clear the big engine valve cover. The battery was placed in the trunk to improve the cars weight distribution; also the cars rear suspension was beefed up with staggered shocks, heavy duty springs, and a thick rear stabilizer bar. The car sat an inch lower overall than a stock Mustang did, so a special "short" front spoiler was designed to fit the clearance available.
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