`70 LT1 SB Chevy 3927186 heads

[VintageMusclecar]

Fresh from the machine shop is this pair of 186 small block chevy heads dated A18 and A23 of 1970. (January 18th and January 23rd)

These things have had everything replaced on them except the kitchen sink!

-Magnafluxed before ANY work was done

-Hot tanked and shot blasted, heads look brand new

-New 2.02" and 1.60" 1-piece stainless steel valves

-16 new bronze guides

-New GM screw-in rocker studs

-New GM guideplates

-3 angle performance valve job

-8 new hardened exhaust seats

-Guides cut for PC-style seals

-16 new KLine valve seals (far superior to the more common white teflon jobs most people install)

-New retainers

-New split locks

-New Z28 replacement springs (110 lbs on the seat, .520" max lift)

-Milled just enough for a clean-up cut (.006")

-Valve spring heights all set for correct spring pressure

-NO PORTING!

These heads are about as nice a set as you're ever going to find. No corners were cut building these heads!

$1400.00 + shipping.

http://www.yenko.net/attachments/286297-1.jpg

Eric

[VintageMusclecar]

http://www.yenko.net/attachments/286300-chamber.jpg

[VintageMusclecar]

Post deleted by VintageMusclecar

[VintageMusclecar]

Upon closer isnpection, I believe the earlier head may be dated A16 instead of A18. You be the judge. Either way they're only a week apart.

http://www.yenko.net/attachments/286310-A16.jpg

[VintageMusclecar]

http://www.yenko.net/attachments/286311-A23.jpg

[YENKO DEUCE REGISTRY]

Shouldn't the intake valves be 'unshrouded'?

[VintageMusclecar]

Marlin;

These heads started off as 1.94/1.50 units, I had them opened up to 2.02/1.60 valves and had the hardened seats installed. The factory 2.02 heads have the chamber relief around the intake valve, but I personally feel this modification is unnecessary. Some claim that you lose flow if you don't relieve the chamber when going to 2.02 valves, but I feel the real area of importance when going to the bigger valves is relieving the valve bowl. (You'd be surprised how many machine shops skip that step when cutting heads for bigger valves) I prefer to leave the chamber alone to keep it as small as possible for the sake of compression.

These heads are set up essentially the same way as the heads on the crossram 302 engine on my website, and it made an honest (and easy) 377 horsepower, so I don't think they're giving up too much flow. http://www.yenko.net/ubbthreads/images/graemlins/grin.gif

Eric

[YENKO DEUCE REGISTRY]

Gotcha!

[VintageMusclecar]

Price lowered to $1000.00 + shipping. Taking a loss at this price, need to move them.

Eric

[70-SS/RS-L78]

Close, I know someone who needs a set of the first week of January

[VintageMusclecar]

Sold pending payment.

Eric