360-1 on 48 deg. block

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Rt1976

Rt1976

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Anyone running Indy 360-1's on a std. deck 48 deg. block? If so does the intake need to be machined to clear the pushrods? Any pics would be appreciated.

The reason I ask is I wanted to modify a 3 piece mechanical injection manifold from a w-9 to fit the Indy head. I have the 360-1 gaskets and the ports line up I just need to slot the bolt holes a little.

I know I'll have to fab a valley plate. I called Indy and they wont sell me the heads w/o an intake.
 
How are you supposed to replace a wrecked/ broke/ cracked head if they won't sell the heads? Marvelous
 
Maybe I'm just dense, but I'm having a hard time picturing why you'd need to machine the intake to clear the pushrods- they come up through the heads...?
 
I guess I should have told her I had an Indy intake. I called and just wanted a set of bare un-ported heads set up for 48 deg. She told me they usually don't sell them that way and needed to get me a price. When she got back to me said they couldn't sell them w/o an intake. Oh well
 
I believe when they set them up to clearance the pushrod it notches the intake mounting flange on the head, not sure on the intake that's why I was hoping for some pictures.
 
Yes you will likely need to clearance the heads for pushrods when using a 48 degree block due to the lifters being angled differently. The lifter spacing side to side I believe is also different on the 48 degree blocks so watch for side to side clearance as well.

Pictures below shows a W2 48 degree head with the port face machining for pushrod clearance needed for the 48 degree block.


P1060727.JPG
P1060731.JPG
 
Last edited:
Rocket said:
Yes you will likely need to clearance the heads for pushrods when using a 48 degree block due to the lifters being angled differently. The lifter spacing side to side I believe is also different on the 48 degree blocks so watch for side to side clearance as well.

Pictures below shows a W2 48 degree head with the port face machining for pushrod clearance needed for the 48 degree block.


View attachment 1715816218 View attachment 1715816219
Click to expand...

Rocket - thanks that's what I thought for the heads but does the intake need to be modified in anyway?
 
Rt1976 said:
Rocket - thanks that's what I thought for the heads but does the intake need to be modified in anyway?
Click to expand...
That's gonna depend on the deck height of the block. There were at least 3 different deck heights available in the R blocks if I recall correctly
 
If i am not mistaken, think they offered the Indy head in a 48 degree version. At least at one time
 
B3422w5 said:
If i am not mistaken, think they offered the Indy head in a 48 degree version. At least at one time
Click to expand...
Yeah at one time they offered it in 59 degree and 48 degree versions. I don’t recall having to clearance much off the intake on a 9.6 block 48 degree deal. Using the Edelbrock Victor heads, I had to clearance the heads for the pushrods but no clearancing needed on the intake.

Building a 650hp street strip 440.....
 
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