need input, is this a problem

[TURBOTERRORV6]

i am purchasing a replacement block for my 87 GN from some guy down in Florida.. here is a pic he send me of the valley casting... holes on the casting ? was this modified for better oil flow for the lifters and cam? need input ASAP. thanks

 

[dr_frankenstein]

pre 109 block. should be fine for any car under 700hp.

 

[mikestertwo]

You will have to drill a hole for the turbo oil drain also. That block does not have one.

 

[Daniel Jost]

84-85 block, that is how they came from the factory. As posted above it will need a hole drilled and tapped for the oil return. It also has a taller deck height.

Dan

 

[SHADOWII]

Post the block #. 4.1's have the same valley appearance. You can epoxy a sht metal valley cover to direct oil flow.

 

[TURBOTERRORV6]

here a casting number he send me..

 

[SIXBANGR]

the block # will be on the left side of the block

 

[charlief1]

This has the casting numbers listed so you might take a look.

http://www.gnttype.org/general/v6hist.html