Aerohead Racing
- Thread starter mrzods13
- Start date
70bigblockdodge
Old Man with a Hat
They have been selling those heads for years at shows like nats they really have become cheap $ since there are so many alum heads out there. I have bought s.s. valves from them, they are part of indy cyl head.
Yea I read some bad things about them. Some guy yesterday tried to sell me 400 heads off of a 75 cordoba. The chambers are smaller in the 72 and up heads right it would have lowered my compression and would have ran like crap. I am starting to see what type of crooks have the stuff I want. These people think they have gold. Thinking of going with 440 source aluminum heads. At this point I'm thinking after getting heads checked and a valve job figuring 6
$600 including buying the heads from someone.
$600 including buying the heads from someone.
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What's wrong with cast iron heads???
Nothing just want a decent set and looking to spend $100 I need to get them checked still and everything that might go along with bringing it to the machine shop. I don't get people saying oh well I'll just let them sit. Yea because they want burials at sea and the heads will anchor them down. I am wonder about the 452s will those lower the compression should I go with 346 instead. The cam has a .477 lift.
commando1
Old Man with a Hat
:laughing4:
70bigblockdodge
Old Man with a Hat
I am putting a set of 452 on a stock 70 short block with the Mopar 284/484 cam. The pistons are .080 down and the heads actually cc out at 90-91, I don't have a buret just a graduated cylinder close.enough, with a .017 steel shim gasket comes out around 8.8: 1 sounds like a 89 octane engine to me I might just square it up and assemble or still could cut a little, still thinking. I will ditch the 2 piece valves for stainless one piece springs to match the cam and some clean up in the ports. Point is don't get so caught up in compression ratio losing one point let's say 9 down to 8 will only cost you about 40 horsepower in a 400 horse engine and the 8:1 will run on crap gas.
67Monaco
Old Man with a Hat
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All big block heads will work on all big blocks with rare exceptions. What casting # did you get?
commando1
Old Man with a Hat
Well the guy got back to he has a set of 452 heads in better condition low miles for $100 so I think I will go with those. Another quick question I called another machine shop for a set of 915 heads completely redone with bronze guides and ready to bolt on they want $750 does that sound like a high price or about right.
monaco75
Senior Member
If the 915's are truly ready to run, I'd go with those personally... Price seems about normal to me.
commando1
Old Man with a Hat
I like 452's better but the 915's are a better deal and makes more sense.
68plymouth383
Senior Member
The 915 are a close chamber head. There better for a high compression engine. Its a step back from the 906's you were running.
I still have to stop at their shop to see what he has, he might have 906 heads or 452s, but this set is already done but I am in no hurry I would like the 906 heads, why is it a step back just curious. I upgraded to a 4 barrel changed the cam, lifters, springs, timing chain, I thought higher compression heads would be better.
commando1
Old Man with a Hat
Higher compression used to be the Holy Grail. When Sunoco 260 was around everybody wanted C.R. The only step above 260 was alcohol.
Today you're capped at 9.5 for practical street use.
Or go retarded timing, eggshell throttle, and octane additive while paying for premium.
Today you're capped at 9.5 for practical street use.
Or go retarded timing, eggshell throttle, and octane additive while paying for premium.
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