I have an 88 C1500 with a 305 and I want to install a remanufactured 350 but I don't kniw what to order. There are so many options such as a two or four bolt main and different lifters and such and I don't want to spend 1500 dollars for the wrong thing. What do I have to look for when ordering an engine so it will bolt right up to my 4l60e? I've done a ton of research to no avail. Any help is greatly appreciated.