86 K30 - ZZ454 Motor Swap - Need Suggestions

[BigBlue86K30]

Working on my 86 K30 this weekend, going to be pulling out the stock Mark IV 454 and replacing it with a brand new GM Crate ZZ454. I am preparing to get everything ready but have run into a few snags. This is my first engine swap but my buddy who is doing the majority of the work says its no big deal. My biggest concern at this point is the use of my existing headers. I have Hooker Competition headers on the Mark IV engine, I cant easily tell if these will fit the new Gen VI 454 or not. I am trying to keep these so I dont have to have the whole exhaust redone.

I have the following other parts ordered from Summit as well already:
- Joe Gibbs 5/30 break in oil
- Coolant
- Transmission Fluid
- Gaskets for headers, collectors, carb and fuel pump
- Crate ZZ454; starter, water pump, plugs, wires, wire holders, GM PP HEI Distributor, dipstick and dipstick tube
- Hughes 2500HD stall converter

I am going to reuse my existing fuel pump, Holley 750 4150 carb, air cleaner, belt system and all accessories.

Can anyone else think of anything else I am going to need or am forgetting? I am not trying to rush the install but want to have all the parts we need rather than having to stop midway through.

Thanks for any info guys!