What engine/trans/rear drive do you run Don ?
It has an aftermarket block by dart, it takes big block Chevrolet type parts but there aren't any chevy parts in it. 567 cubic inches, single 4-barrel intake with a Holley Sniper EFI. Somewhere near a Thousand HP, it has a 9" torque converter in an ATI aftermarket powerglide shorty case, The rear end is unusual, being a 12 bolt chevy with Oldsmobile outer ends, narrowed and braced, with 35 spline axles and Mark Williams internals. The 12 bolt has less resistance to turning than a 9" ford but isn't quite as strong by design. We broke the first gear set with no case damage, it turned out to be street gears.
The car was originally built for a V6 Buick or a small block chevrolet. We lengthened it, braced it and installed rear suspension. It also had the small airplane tires in the front which were the fashion of the day when it was built. We got a set of Weld 17" front wheels and Hoosier tires. It runs a 33/16.5 soft sidewall wide slick on 15x15" rims.
A 567 c.i.
![Cool 8)](http://forums.sohc4.net/Smileys/default/cool.gif)
Does your transmission shift on it's own,or do you program it ?
Don will be the one who knows for sure.
But I’ll guess with a thousand horse power, he’s got a manual only valve body on the glide. Maybe a tachometer triggered upshift if track conditions allow. Probably not. If it spun out in low and shifted up it could get really wild in a nano-second.
Old GM power glides “wide open throttle” (no vacuum) up shifts were controlled by the governor, if the transmission kick down linkage was adjusted properly. If adjusted properly the valve body relied on the transmission governor (weights and springs) to initiate the max rpm shift. Which was adjustable too, by lightening the weights and/or stiffening the govern spring… part throttle upshifts were controlled by the vacuum modulator and the linkage depending on the manifold vacuum. You could probably google the power glide oil flow chart to see it…way back they had a cable kit to get rid of all the linkages and bell cranks for the power glides. Which really helped with engine and trans swaps for the street machines.
Edit: Interesting tid bit…
Power glide parasitic loss stock 17 horsepower.
350 turbo. “. “Stock 38 horsepower.
400 turbo. “. “Stock 52 horsepower.
M22 rock crusher w/30w engine oil 4th gear… hard to measure…less than1 hp…🤔
Learned this the hard way…