there is no benefit finding an "old OEM fan" to fit a later engine in a modified truck - I'd find a fan that fits the opening - this one is some generic cheapo from a FLAPS, required no modification to fit perfectly, and works fine

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot