I am currently looking around for a small block 350 to switch out my current 305 with. My dad and I within the past 2 years put in a new carburetor, intake, headers and made the exhaust true dual instead of the factory Y pipe. How much of that would be compatible with a 350? It's also a T-top car and I have received mixed advice about needing to brace the frame underneath to prevent potential twisting/cracking of the T-tops because of the added power. Are there specific years I should look for?