[Bob Carriere]

Hi Walde.

I first tried shortening the shaft on a good 261 pump and used a shallow chromed pulley from a SB Chevy..... had to grind the body of the pump to get more clearance as the pulley was rubbing on the outlet casting. The all the fans I had.....4 blades, 5 blades and 6 blades were not fitting properly and would hit the lower pulley on the crank........or the big GM I had was hitting on the lower outlet of the rad because the fan sits so low...... besides even with the fan blade removed I still did not have sufficient rad clearance.

The other issue is that you have to discard the large elbow outlet that fits to the head of the 261....... mine was the larger model and it prevented the installation of the throttle linkage..... I reverted back to a 216 elbow from an old cab 13...... it has a special flat spot on the bottom of the elbow that is needed to fit the throttle rod behind the pump pulley.....

Reluctantly I went with the adapter and all fits well so far...... I will need to run it wirth the full engine enclosure before I know for sure if it will run hot or not!!!!!

First picture of my 261 with the original pump and 1959 GM fan......looked nice but was useless..... not enough clearance for the rad and the fan blade hit the lower outlet of the rad....