Ok so since were having another baby,i wont be able to afford the ls1 that i wanted so im going to use the 350 i have in another project truck. I realy dont know much about the engine except the PO said it was newish. I have added a eddy 650cfm carb. My plans are id like to run some aluminum heads. form where i dont know. maybe a newer type engine or used aftermarket ones. Dont know squat about cams, but i want the engine for decent fuel economy and some hidden power for when i wanna play with it. What do you suggest i do to the engine, and what should i buy. thanks. Oh yea. This will be on a very tight budget. so please concider that.