Need a TBI 4.3

Need a 4.3 V-6 For a tired ECSB 89 Chevy PU With TBI :doh:

I am not sure if the newer SFI 4.3s will work if i just swap intakes and accesories
are the Heads Diffrent? :duh:

My freind's 16 year old got ahold of his Work truck,Got it stuck,Smoked the Clutch and Then Blew Engine!
It Knocks, it smokes, and the oil looks like a milkshake, i think its done.

Please PM me if you got one laying around In Texas

Thanks