Need Major Help

Ok I have gotten a 5.0 motor from a family friend while waiting for him to contact me re what it originally came out of I pulled the casting #s
Block E7TE Which when cross ref is 87 Truck Date Cast 6K31 which is oct 31 86
Heads E6SE which is 87 t-bird... or mustang heads
The upper intake is E7ZE which is an 87 mustang upper intake
Guy who gave me motor states 93 mustang
The Pistons were flat topped no valve reliefs

Is this just a Frankenstein Engine?
I do believe its an H.O.
Were the motors ever assembled in this fashion? Or should all the numbers have match. Was there a year range maybe that all the parts could have been used together
Im trying to reassemble the motor and need gaskets but am uncertain which to get. Any help at all would be greatly appreciated..

 

E6SE heads would have come on the non ho engines 87 & up, but were used on 86 HO engines.
If your block is a E7TE, it could be just a passenger car engine.

 

I also understand that the 86 H.O. Came with forged flat top pistons no valve reliefs. So should i trust that its an 86 H.O.

 

My engine had the same combination -- a 302 roller engine with E7TE block, (near) flat top pistons with no valve reliefs, and E6SE heads. The heads may not have been original. I replace them with E7 heads.

Would be interesting to know if an HO cam is different/better than the non-HO cam but no one seems to know the answer.

 

ok pulled casting numbers from the pistons e6ze-6110 ba 1986 forged aluminum pistons. Im pretty sure its an 86 HO I believe non HO Pistons were cast.
Correct me if i'm wrong please

 

E7TE block!! You might find some of this thread interesting. I had similar questions about my engine.
http://mmb.maverick.to/showthread.php?t=56526

 

All the forged pistons on 5.0s have TRW cast on the inside of the crown


No valve reliefs mean no aftermarket cam,and the E6 heads flow very poor FYI

 

Yea I've Been reading.. Ill make for now but I have some plans in store now that I know what I'm dealing with.

 

Thank you all for the help Im almost 100% Positive its a 86 HO Now for the fun part assembly and mods... We'll see where this takes me...