Speaking of blocks only, is there a difference between the 06 3v aluminum blocks and 4 valve aluminim.blocks from the same era?

it is mine appreciation they are the same. Some have done the 4 valve but gains where negligible . I dont know how but they did explain. Maybe its the size of the valves and total flow of the stock 4 to the stock 3 . than all the support and PC stuff to make it work.
Maybe a 4 valve ecu and HP tune would make it a banger

No difference. But early tekside I think are 3 bolt on motor mount bracket. Later newmark are 4 bolt motor mount bracket.

1 other thing if I remember correctly front wheel drive Lincoln 4v v8 modular blocks don't work in rear wheel drive cars? Don't remember why or who told me this.
Think 2004 blocks are newmark. Strong block. The ford motorsport aluminator block was latest version.
Tekside will handle 1000hp + after that I know drag racer who broke all main caps off! Yah but turbo was size of attic fan.

Rumor is the Nemak 05+ blocks are the technically stronger than the Tekskid due to extra webbing in stress points.
As for the original question, after late 04 they were all Nemak I believe, and all the same.

TA28 said:

1 other thing if I remember correctly front wheel drive Lincoln 4v v8 modular blocks don't work in rear wheel drive cars? Don't remember why or who told me this.
Think 2004 blocks are newmark. Strong block. The ford motorsport aluminator block was latest version.
Tekside will handle 1000hp + after that I know drag racer who broke all main caps off! Yah but turbo was size of attic fan.

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There is a dude named Thomas Sanchez in Texas that has a Whippled and sprayed 4.6 3V Nemak block running 1200 hp.

You would be lucky to get about 60% of that in road racing trim. Valve springs and all that would still need to be changed every 25hrs or so of track time.

Don Lariviere said:

You would be lucky to get about 60% of that in road racing trim. Valve springs and all that would still need to be changed every 25hrs or so of track time.

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He's talking about dragster guys,but the mod motors are built pretty tough

Don Lariviere said:

You would be lucky to get about 60% of that in road racing trim. Valve springs and all that would still need to be changed every 25hrs or so of track time.

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Blacksheep is right, and he has to rebuild quite frequently.

I’m at 600 WHP, and that is more than plenty haha

Ford racing 5.0 4v cammers lasted 250 300 hours in fr500c before rebuild.

TA28 said:

Ford racing 5.0 4v cammers lasted 250 300 hours in fr500c before rebuild.

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Yeah, I think the Grand Am boss 302s were rated for 50 hours. The FRC cars were
" spec" so they could do that.

Not sure on boss 302 motors. I bought 2 spare fr500c engines. 1 off dean when I bought car. Other off Jim seafuse.
When roush rebuilt them I'm sure ALL timing components went into scrap pill. And I mean everything other than bare head! and all other things that would be changed in a rebuild.
LOVE to find original motor seal tags!

I do know the later imsa ran boss 302s and R they went to dry sump oiling systems. And cortex rears. And tall gears 4.30 ect

Also if you do a build I would see block you have? Probably wap which is newmark.
Think about stroking it. Either 3.750 or 3.800
Crank. Manley 5.850 rods and matching pistons.
On 92 mm bore will give 5.0 or almost 5.1 liters
Also get rid of all sps bolts use ARP!

TA28 said:

I do know the later imsa ran boss 302s and R they went to dry sump oiling systems. And cortex rears. And tall gears 4.30 ect

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I was around for that, the S197 were wet sump, but dry sump in Pirelli series

TA28 said:

Also if you do a build I would see block you have? Probably wap which is newmark.
Think about stroking it. Either 3.750 or 3.800
Crank. Manley 5.850 rods and matching pistons.
On 92 mm bore will give 5.0 or almost 5.1 liters
Also get rid of all sps bolts use ARP!

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Absolutely will be putting a stroker in it

Guy on ebay had kellog 3.800 crank new 4sale cheap 500$
There forged steel. Kellog made the steel 4.6 8 bolt cranks for ford.