PontiacSpeed.com
505cid Specs
Block: Indian Adventures 3" main standard deck
Rods: Eagle 6.80”
upgraded to ARP 230,000 bolts with 2.2” journals (bbc std.)
Piston/Rings: ROSS
with .080" dome, 134gm pins, Total Seal Gapless
Balancer: TCI
Rattler
Flex Plate: TCI
Bore/Stroke:
4.350"/4.250" Eagle 3" main
Heads: Edelbrock
330/237cfm 71cc, cr 13.00, 2.19/1.80 valves, head stud kit
Pushrods: 9.350”
.080” wall 5/16” cm
Intake: Edelbrock
Victor, port matched, turtle and mild porting in plenum
,1/2” spacer
Carb:
King Demon RS 1095cfm
Cam: CompCams roller
312/316 (284/288 @.050), 108ls
installed @103,
.440/.440
tappet lift, 700/700 net lift with .026/.026 lash and 1.65 roller rockers
Ignition: MSD 6AL,
MSD crank trigger, MSD 8981 programmable timing control and is sent
through a gutted GM HEI
Exhaust: Custom
round port 2.125"x34”x
4" (12” long) collector headers,
4” Dr.Gas ‘X’ to 4”
Spin Tech mufflers and no tail
pipes
Oil control: Melling 80psi oil pump, Canton oil pan
This combo netted a 733hp @ 6200 and 640ft/lb @ 5000 on the dyno. NOTE: this was with off the shelf Hooker 2" 70-81 F body headers
We then broke a lifter and hurt the cam so will stuck in an UD 271/278 @ .050 (307/314) and .689/.689 roller on a 108ls installed at 105 and got 701hp @ 6200 and 676ft/lbs @ 4900.