That's a GM throttle body "TBI" I installed that same set up on my 86 C20 W/454 and even went as far as Installing two GM in tank fuel pumps (dual tanks) it worked out so good I had to put one on the 51, I got a 87 blazer 25 gallon with in a tank pump for under the bed I think it will work out cool

Some people are like Slinkies, Their not really good for nothing... But they still bring a smile to your face when you push them down the stairs.

1951 3100 350 TBI Gallery Toddzilla... "$old"