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Need Head Info 3870810, UP-Date

5.2K views 3 replies 2 participants last post by  Ram  
#1 ·
Anyone know of this number heads? I'm being told they are W-2 LA bolt style Econos'? I have not been able to reference that number anyplace?
Thanks
Gary
 
#3 ·
Chump said:
Interesting it does say that the headers do fit:
318/340/360 A-engines with W2 Econo heads - casting no. 3870810 (LA style bolt pattern)

Now just need to find out what the flow numbers are, the cc's in the chamber, the circa (year or approx, I know it maybe on the heads) and if it is for long stem or not valves and what rocker assy will fit.

I can pick them up for $600.oo with a Holley Dominator manifold (single plane for a 4brl) with no porting / milling or valves train period. Think that is a good price? Never been on anything, do have bronze insert guides and has hardened exhaust seats.
Thank you Chump :)
 
#4 ·
Ok, have gone and given the shop a $100.oo down to hold them. Found out that they are mfg in 1977, use W-2 off-set rockers, have tall ped's but have to have the bar adpters to hold in place the rocker bar. Have 4 angle grind on the seats, exhaust seat has been up-graded to hardened seats and in doing so some of the exhaust was hogged out and bowled and blended some during the install, nothing radical. Has 70cc chambers and has 4 bolt patern for stock LA exhaust. Heads have been used slightly, and are not new as I was told earlier. But just the same not any milling or porting were done. Look real good have some pix of them to help me save my pennys. Along with the heads the Holley Single plane Dominator comes with it.

We will have H.P. when they get onto the Beast!