These were off a Merc 575sci. I acquired the parts through a blower purchase. Previous owner claims he was running 10psi with no issues. Please respond and/or PM me with any questions and I'll do my best to answer.

Top pulleys 3.25inch - $90 each, $160 for both.
Lower pulleys 6.5inch serpentine belt type - $100 each, $180 both.
Thermo housings - $75 each, $130 for both.

Also selling the snouts. One is complete bolt on ready. The other is apart as I was going to rebuild but decided to purchase new snouts from TBS half way through. Can't find any pulleys to fit the splined shaft and I need lower boost than the 3.25 upper pulley makes. Only one idler pulley is available, I destroyed the other by accident.

$250 bolt on ready
$150 disassembled

[ATTACH=CONFIG]565751[/ATTACH][ATTACH=CONFIG]565752[/ATTACH]

Open to offers.

Thermo housing sale pending.

Pulleys sale pending.

Thermo housings SOLD. All else still available.

I would be curious if i could convert a 250 half spline snout to a full spline short snout using these.

That, I cannot tell you. Maybe run it by Holley?

ttt

Also have a steering actuator and inside tie bar sitting on shelf since switching to hydraulic steering. $40 plus ship.

Upper and crank pulleys still available. Open to offers.

Update, parts in pic still available.

Merc 575 pulleys $65 each plus shipping
Blower Shop dual carb mounts, could use a polishing $100 each plus shipping
Shaft and couplers free plus shipping
Steering actuator,$20 plus shipping

Pm me your number, possibly interested in upper pulley