I was looking for the size of the he stock block of a 1999 f150 RWD

 

Size? Which engine? External dimensions? Please clarify your question.

 

It's an 1999 4.6 v8 trinton lariat flareside

 

2 wheel drive 4.6 v8 triton lariat edition and it's a flareside

 

You still haven't told us what exact "block" you are talking about. Engine block or what?

 

the leaf spring block because the previous owner lowered it and I want to get it to stock height

 

I don't see a block anywhere in these diagrams.

https://www.tascaparts.com/auto-part...uspension-scat

https://www.tascaparts.com/auto-part...e-housing-scat

 

If he leveled it he most likely used lowering shackles. The stock shackle is 4.5 inches roughly center of the bolt to the center of the other bolt. If you measure something like 6- 6.5 inches it's a lowering shackle. Also count the number of leafs in the rear springs and if the overload spring is still there

STOCK SHACKLE


.
LOWERING SHACKLE



COMPARISON

 

the four wheel drives had a block from the factory

BUT once again, the OP's lack of basic info hinders any useful assistance at this point