1973 STEP A SIDE

iTrader: (4)

https://www.turnone-steering.com/col...uminum-pulleys

Toddoky

The pulley you need is found on early 90's V6 F-body cars, S10 trucks and a few other GM vehicles. The part number escapes me at the moment but I can retrieve it from my files at work and post it.

B52bombardier1

Fabulous, really appreciate it. This saves me more money to buy stuff from Bowling Green. I'm originally from Owensboro.

Rick

usc2001gc

iTrader: (1)

You can try to find a used s-10/camaro pulley part #14100597 or Dirty Dingo makes a billet aluminum pulley that is 5" in diameter for the truck pump.

I've got the Dirty Dingo on my 72 Chevelle Wagon 5.3/4l60e project conversion with the 302-2 and forward bias Holley engine mounts. Clearance is good at the power steering pump.
(I thought the accessory bracket I'm using was supposed to move the ps pump up to give additional clearance,but only moved the alternator, I ended up buying the dirty dingo pulley to get the clearance).

chuckd71

iTrader: (23)

Some pontiacs / other GM two doors with the transversely mounted V6 (90's Sunbird and its ilk maybe) have them as well. I'm no expert, but going too small with the pulley sounds like it might spin the pump really fast, though I have no clue what the upper limit of acceptable is.
Edit - Corsica might work as well. I don't remember it being this much work but then again at the yard most motors are at least partially disassembled. www.youtube.com/watch?v=-2BOIdWvo4k[/url]

Toddoky

You are correct chuckd71, the smaller pulley does speed up the pump and is merely mentioned as a budget friendly work-around for those that are insistent on using the truck accessory drive set-up. The Corvette accessory drive configuration is by far the most adaptable accessory drive for use in A-body applications and allows the use of the full-diameter PS pump pulley.

chuckd71

iTrader: (23)

I meant the Dirty Dingo 5 inch one mentioned might be on the smaller side. The one I was talking about might be as well, but I was thinking it was 5.5. Not a huge difference regardless I don't guess and likely not a big deal unless you're spinning your car to 7,000 every time you leave the house.

Toddoky

Yeah, the GM pulley is slightly over 5" at the actual measured belt wrap diameter (about 5.25") so it has a little bit better margin of safety than any pulley that measures 5" at the same point of reference. I picked up the GM pulley off of ebay for only 20 bucks, so that may factor in to someones choice to use it over another pulley as well.

Toddoky

For those interested in knowing, the Hooker 1968-72 El Camino/Covertible transmission crossmember has been officially released and is listed on the Holley website. You can find it by performing a search for part number 71222021HKR.

1973 STEP A SIDE

iTrader: (4)

Is this lower then the stock mounting pad ?

G Atsma

That is a good question, but I would doubt it, as the angle of the engine/tranny would have to stay the same as before; if the pad were lower this would not happen. I have a feeling this crossmember is only different so it would fit the El Camino/convertible frame.

1973 STEP A SIDE

iTrader: (4)

Hey G when I used my stock crossmember it only had 2 deg. down on engine and trans . I was always told that I should be at 3 deg. down . I cut my stock crossmember and drop the pad 1/2" and got me to 2.6 deg. down .

G Atsma

OK, but did your engine mounts lower the engine a bit compared to the original engine? If so that would explain why you only had 2 degrees.

Toddoky

The mounting pad on the stock crossmember is positioned for compatibility with a TH350, TH400 or stock manual trans, all of which have a different mount pad elevation than any of the modern GM or Tremec transmissions. The Hooker A-body transmission crosssmembers have a dual mount pad configuration for direct compatibility with T56 or 4L80 transmissions. Other transmissions require the use if a spacer block.

chuckd71

iTrader: (23)

If he is trying to get more downward angle toward the rear then upward spacing doesn't sound like an issue. Being able to drop it lower seems to be his problem. I might be misreading things but I think what he needs is a lower mounting point; if the Hooker pad mount platform is the same height or higher than stock he's SOL. If it's lower (even too low) he could always space it up. At least that's my interpretation, which is similar to my own situation, but I could of course be mistaken.

1973 STEP A SIDE

iTrader: (4)

This!!!!

ycgoat

Awesome, Thanks for the update

1973 STEP A SIDE

iTrader: (4)

So can you explain to me the difference in pad elevation from the stock crossmember to the new crossmember for the boxed frame? When you designed these what kind of engine transmission angle of degree down where you shooting for?

Toddoky

The mounting pad elevation of the Hooker El Camino/convertible crossmember is the same as the Hooker crossmember for the standard A-body cars. The engine/transmission angle targeted during development of the swap system components is that which provides desirable U-joint working angles on a vehicle which is set-up with stock to moderately lowered ride height (1" drop).

The typical U-joint working angles you'll see using the Hooker components is 2 to 2.5 degrees and that usually works out to be an engine inclination reference of about 3 degrees.

The absolute engine/transmission angle is only important as to how it affects your U-joint working angles and your focus on it should be prioritized in the same manner. That is because your chassis ride height and the pinion height of the rear end you are using will greatly affect the engine inclination angle you will have to run in order to achieve desirable U-joint working angles.

The engineered maximum recommended U-joint operating angle is 3 degrees, but that is heavily dependent on RPM(the faster you spin them the less angle they will tolerate). If you can obtain 2-2.5 degree U-joint operating angles that will be very workable in an A-body application.

1973 STEP A SIDE

iTrader: (4)

So I guess the simple question is do you know the pad elevation difference ? I went ahead and ordered one today so I guess I will see next week if I keep it or send it back .

Also I have a 9" ford in the Elco .