is there any particular reason you want to do a 3-2-1 build? Are you just doing it because the internet said to do it?
The reason I ask is, I had a gen 1 engine with long tubes and a gen 3 intake. It made 436 rwhp.
I then swapped gen 2 cams and a ported gen 3 intake with better long tubes. It then made 450 rwhp. The cam swap was not worth the trouble.
Gen 1 heads are very capable of making power.
The gen 3 blocks have plasma arc wire transfer coated cylinder walls. The slightest issue in the cylinder and the block is trashed. There is no honing or repairing a gen 3 block unless you sleeve it. At that point, you could sleeve a gen 1
Also, welcome to the forum. We will certainly help you out.
I really appreciate it much and I was told it’s a good combo to go with for hp but I want reliability but the best alternative is to go gen 1 if so how much for the engine and what will I need ? Besides the engine I want to take time and fo the correct way