Here is my rule with any upgrade regardless of the vehicle be it a car, dirt bike etc. You cannot safely increase horsepower without equivalently addressing the suspension and braking systems. Manufacturers build the car to work as a system. The 41's brakes work well for the 90 HP engine it has. The suspension is designed to handle the weight of the engine in the car. The cornering will be fine at the speeds the car is designed to go. Add a 350 SBC you will need brakes to stop that amount of HP, springs to support the added weight, shocks / springs to handle the speed in the corner, tires to grip, a new tranny / drive line to handle the power. The question is not to do the motor or brakes / suspension first, it is how do I get to my goal safely. Once you do one part it will not work well with what the car has, it has to be viewed as a system of parts that complement each other.
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