long block replacement

[71 fun]

I put this on the 88-98 board and received no response, could any motor heads help?
I am going to replace a friends 1991 350 tbi engine (rod knock) with a long block bought for this year and model (1991 1/2 ton 4x4) I have built older models and had good luck with them.Should I be aware of any problems I may encounter as to intake manifold, distributor, timing,ect... and where could I find any reference material which would outline change over, thanks.