[HWYSTR455]

Originally Posted by nmoreilly

66 GTO hardtop.

AGE M23 4 Speed
3.73 12 Bolt Rear / Eaton Posi, Moser 31 spline axles

IAII - 535 Block
KRE hi port heads / 260CFM
Scat Light Weight forged 4.5” crank Crower I-Beam Sportsman rods. Diamond forged aluminum pistons
Approx 10.5:1 CR / 94 Pump
Howards HR - 305/309 adv, 251/255 @0.50, 114/112 LSA/ICL,4/7 swap
Johnson short travel HR lifters
Holley EFI / FAST 4500 TB / Victor Intake
MSD 6AL-2 programmable / MSD crank trigger

705 TQ @4500 / 699 HP @5600, 32 degrees total advance. We had to use a quick fuel 750 for the dyno (don’t ask) so probably left some on the table. Car is predominantly street driven.

Vid/pic attached

https://youtu.be/vz-l29omL70

Very nice, close to my combo, gives me an idea.

What do your heads flow?

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