What do you think guys.... 71 AMC Javelin....

[Brads70]

Went to assemble the springs on the heads when I discovered 1 retainer was wrong, didn't match. Called Bullet cams and they are mailing me a replacement, so we wait..... Installed spring height was short by .040" and my buddy didn't have the right spring seat cutter so I rushed home and made one out of another one he did have . Worked great. All cut and waiting for that 1 retainer....

[IRON MAN]

Do you have the 291, 503, 090, or 993 heads?

[Brads70]

Do you have the 291, 503, 090, or 993 heads?

Not sure?   090 I assume.
seems they are from 1973 only?  What can you tell me about them?
http://www.purpleized.com/AMX/head.shtml

[YellowThumper]

I found this.

http://theamcforum.com/forum/cylinder-head-flow-numbers-factory-aftermarket_topic159.html

[Brads70]

I found this.

http://theamcforum.com/forum/cylinder-head-flow-numbers-factory-aftermarket_topic159.html

Interesting! Thanks! Looks like of the 3 stock 401 heads I lucked out with the better ones. What's your screen name over on the AMC forum?

[blown motor]

Glad to see your moving along with that car Brad. 

[IRON MAN]

Brad, I installed 090 heads on my 68 AMX 390. The 090 heads lowered the compression from 10.25:1 to 9.6:1. The highest octane gas at the pump in Ca is 91. Cast iron heads don't do well on 91 octane engines with 10.25 compression.  They actually flow a wee bit better than the high compression heads (291s) because the 090's combustion chamber is larger and there is less valve shrouding, and no pinging or detonation.

[YellowThumper]

I found this.

http://theamcforum.com/forum/cylinder-head-flow-numbers-factory-aftermarket_topic159.html

Interesting! Thanks! Looks like of the 3 stock 401 heads I lucked out with the better ones. What's your screen name over on the AMC forum?

I am not part of the forum. Just popped in to look based on your question. Although I have always had a soft spot for AMC. 69 Rambler was my first car and always dreamed of cloning it into a Scrambler.
Unfortunately a drunk took it out. Not me lol.

[Brads70]

Finally got a nice day with no rain to work on the car. I'm working in the driveway.  I got just one side done . Tied the front subframe into the square tubing frame rails I inserted earlier. Used 2x4 square tubing  sunk it into the subframe and inch or so , still need to weld it some from underneath. I'll get to that latter. Should be much stronger than stock. 
The missing valve  retainer showed up this week too!  Bullet cams shipped me one no charge. So if I get a rainy day and some time next week I can finish assembling the motor. Won't be long till the weather turns and ends the "Javelin season" Did I mention I hate living here!  Still have a bunch of sub assemblies I can work on all winter.  I'm hoping to have in finished in time for Carlisle? But it is the 50th for the Challenger so I should take that I guess.

[nsmall]

Nice work Brad.  What town are you in as I am trying to figure how bad your weather is and Ontario is a little broad. 

[Brads70]

Nice work Brad.  What town are you in as I am trying to figure how bad your weather is and Ontario is a little broad.

Thanks ! I'm in Barrie, Ontario. We are in what they call a snow belt. About 20 minutes down the road south from here it often is like a line where when it snows we get dumped on and 20 minutes away nothing or very little.  Good place to live if you like to ski.

[dodj]

And I'm in Thunder bay. Western side of Ontario just north of Minnesota on the shore of Lake Superior.
Leaves are  almost all on the ground now
Brad is a southerner. They get all the nice warm weather. 

[Arctoad]

Hmm Maybe Thunderbay or Barrie.... I'll take door number 3.
I feel your pain brothers. Peterborough is not much better.

[blown motor]

I'm southwest of Barrie near Stratford. Barely a tree around here with leaves turning yet. 29* today, that's 84F. Very unusual for the later part of September.

[nsmall]

Looks like from October to the end of April, little chilly/frozen.   Summer looks very nice, actually you have 5 nice  months of "warm" weather.

Better get on it, winter is coming soon.