stangdanger

so tomorrow I am going to look at a bare block that I found on CL for my mustang the guy that is selling it said when he bought it that the guy told him it was from a mustang. The block will be going in my 89 hatch is there any way to tell if its a roller block and if its HO buy the casting numbers?
I am sure this has been answered a dozen times but I cant find the info I am looking for thanks.

Duncan_GT

http://mustangtek.com/FordDecodePlus.html

Use that to decode the engine. Roller motors came out in '85 i believe

stangdanger

thanks duncan anyone else have anything to add

88 orangepeel notch

I think firing order is different on HO/ non-HO motors. Search alittle more, you'll find it.

stangdanger

ok so I bought the block just because of the good price $180 and it has been vatted. the letters on the block are f1se and the xxx's are under where the intake goes. from what I have found this is a 91 thunderbird motor will this work with my 89 fox internals crank pistons etc.? and is this a H.O or do the internals decide that? sorry for all the questions but this is my first build thanks.

88 orangepeel notch

I believe the internals are the same, that should be an HO roller block. Somebody correct me if I'm wrong…… I'm just going by what I can remember off the top of my head.

mattdel

Yeah you're good. Build away.

tinman

All your stuff should work fine.
While everything apart I would take it in and have it balanced, it does make a differance......

stangdanger

difference as far as performance or lifetime of the engine?

88 orangepeel notch

Both, you'll notice a difference between a balanced and unbalanced assembly at 5000rpm.