If its $2,000 then there is alot more that needs to be replaced than the things you mentioned. It takes 75% of the cars value in damage for the insurance company to declare a car a total loss. Just because it looks like it just needs a new bumper, fender and radiator doesnt mean there isnt alot more damage behind those damaged panels. My friend bought a totaled RSX because he had the same thoughts that your having and then he found out that salvage titles are more of a pain in the ass than they are worth and even if he invested the money and fixed it, getting a new title would require alot of time and work. If you can afford to pay $2000 for this car and pay to get it fixed and pay for an RB26DETT then you might as well buy a used 350Z with a clean title and sell the VQ35 that comes in it to finance the RB engine that you want. For the project you are describing you really might want to reconsidder making this purchase.