Difference between 318 ARP head bolt options

[acastro22]

How do I tell if I have W2 econo or edelbrock RPM or neither ? Would a picture of my current head bolts help?

This is the last thing I need to order before rebuilding my 318.

TIA!

 

[gzig5]

What heads are on your engine? W2 and RPM heads are aftermarket. Ic you have stock cast iron heads you don’t want those in the picture

 

[Uncle Bob]

What heads are on your engine? W2 and RPM heads are aftermarket. Ic you have stock cast iron heads you don’t want those in the picture

I think what he wants is the second photo "Exc. W-2, W-2 Econo heads or Edelbrock RPM heads" Exc. is short for Except - Right?

 

[gzig5]

I think what he wants is the second photo "Exc. W-2, W-2 Econo heads or Edelbrock RPM heads" Exc. is short for Except - Right?

Yeah, that makes sense. If I remember correctly, the W-2 and the Edelbrock heads require two extra long bolts and the first one has four long bolts so that would be for the W-2.

 

[Newbomb Turk]

Yeah, that makes sense. If I remember correctly, the W-2 and the Edelbrock heads require two extra long bolts and the first one has four long bolts so that would be for the W-2.

I can't remember exactly if the late W2's take two longer head studs instead of one, but the early EW2 stuff takes one long and one short.

I never order studs (or bolts) with the short studs. I buy the kit with the long studs and make up spacers.