slant fuel injection opinions

There is Megasquirt which is incredibly DIY and versatile. Go visit "Binder Planet" (About International Harvester products, AKA "Corn Binder" and read the tech page on EFI. Some folks over there have drilled intakes for injectors and used various controllers, including GM computers which have a socketed chip and for which you can burn a new file

"START HERE"--Fuel Injection FAQ--"START HERE"

Also, consider TBI to keep things simple. Somebody, Holley? recently came out with a small 1 or 2BBL setup aimed at Jeep 6 whangers

Here's one based on the Holley 2300 base but I don't think that is the one

Holley Sniper 2-bbl EFI Self-Tuning Kits & Accessories | JEGS

Also, consider something like an old K car TBI driven by Megasquirt, etc. In other words a throttle body and injector