454 tbi questions

[66gmcguy]

Hello folks. I am contemplating swapping a 454 into one of my trucks, but I would like to run a factory TBI setup on it. My friend has several 454s he's willing to sell but I believe they are all from pre TBI trucks. If I bought one, could I just install a TBI intake, distributor, knock sensor ETC on it, or were the TBI engines different? The only real change in big blocks that I'm aware of is when they went to a 1 piece rear main seal in 1991. I am wondering if I bought an engine from something as old as maybe 1981, the TBI stuff will be a direct swap onto the engine. Thanks