http://www.dyno-shop.com/pictures.html
there's an SD4 with a splayed valve head that would be an indication on what a SB2.2 head could do for the NAjr block.
![Image](http://i23.photobucket.com/albums/b361/FieroWannaBe/sd4/lrg4.jpg)
"4 cyl. Iron Duke Super Duty Pontiac with Nickens/Chevy
splayed valve head on the dyno. 183 cubic inch, 390HP,
285 ft./lbs. Used in a NHRA Competition Eliminator
rail that runs 8's at over 150MPH! Launches at
7,200 RPM and goes through the traps at 9,400 RPM."
I'm hoping I can hit the very high 250's at the wheel with the 801 head.
I have obtained a very cool 1985 GM performance Parts catalog, a full copy of Pontiac Performance Plus (with Race car fold-out), And a couple of Hot Rod Magazines containing some SD4 articles.
I can post some snaps of the cool bits as soon as I find the best way to digitize them.
I did order a straight cut timing gear set, before they become unobtanium.
![Image](http://i23.photobucket.com/albums/b361/FieroWannaBe/sd4/20150325_201529.jpg)
Here are some basic dimensions of the ports on the '801 head casting:
![Image](http://i23.photobucket.com/albums/b361/FieroWannaBe/sd4/20150403_144249.jpg)
The intake is 1-1/4" X 1-15/16 x 5" long
![Image](http://i23.photobucket.com/albums/b361/FieroWannaBe/sd4/20150403_144330.jpg)
The exhaust is a 1-1/2 x 1-1/2 D port and is 4" long
I am hoping to exercise a contact at PSI Engines to talk about looking into the crankshaft from the 3.0L Industrial engine (those heads are port injection capable now.)
Part number for the crankshaft is: 93442002
I am pretty sure it has the SBC flywheel bolt pattern though.
car.