heads
 

How much do you think a set of cast iron 3964290 would run a person?

Re: heads
 

good uncut matched pair would range from 250-400 usually. If that last 0 was a 1 (291) you would get a serious cashectomy

Re: heads
 

What's so special about the 291's?

Re: heads
 

1970 LS6 454/450 and L78 396/375 Closed chamber square port high compression, only came on the "special high perf" motors

Re: heads
 

291's are square ports and fit L78 and LS6 motors.
$1000-$2000 price wise.

Re: heads
 

The 290 heads are a good choice for a street performance BB build....chambers are little more open than the real early closed chamber heads and they have the oval ports, much better for low-mid range torque.....upgrade to 2.19/1.88 valves, unshroud the chambers a little for the larger valves, some minor port cleanup, good hardware and you have a great set of BB heads that will easily support 500hp. My next build is in progress with a set of these heads....another tip: if you are using a 2 bolt block add the releifs in the top of the cylinders like the 4 bolts had..helps those larger valves to breath.


wilma

Re: heads
 

I've been looking for a set of 290's for a while and they're not that easy to come by. I've had prices in the 600/700 range for a stripped pair, which will cost considerably more when finished. I think your looking at more like 800/1000 for a set of heads that are complete with a decent date code that only needing a freshening up. Good luck

Re: heads
 

P.S.If your not concerned about the casting number or date code look into a set of 69 1063's, they are the same head except for the plug size as the 70 switched to peanut plugs. The best price I've found so far for these heads is 400 for a bare set in Canada. Either way, they're not cheap as they don't make them anymore and there is a significant demand for them.

Re: heads
 

You said that you've been looking for a while, have you found any?

Re: heads
 

No, I haven't found a decent set of 290's yet but the best I've found is the 1063"s in Canada for 400 stripped. By the time I ship them and redo them I'm looking at 14-15 hundred. If anyone has a pair for 250-400 I'd buy 3 sets. I've had more luck finding single 290's and they usually want 400-500 per stripped head.