'88 EFI overhaul

[Phil112]

I have an '88 C-10 that I am building an engine for. I am hoping some of you can give me an idea of how these pieces are going to work together, and how much horsepower I am adding over stock.
It is a 5.7L. I am using a stock GM roller cam out of a passenger/cop car. flat-top pistons. 1.6 comp cams roller tip rockers. I am thinking of adding an injector spacer. When complete I intend to put in a chip.

I want this truck to run for 100k miles, at least. The overall goal is increasing economy, horsepower, and longevity over the stock engine in this truck.

This build has financial boundaries also. I really want to put full roller rockers in it, but that is 100+ dollars over the already steep price of 170 bucks for steel roller tips.

Anyone have any input on this thing? Any recommendations on chip brand?

thanks