My 64 copperhead

[azdude1964]

The reason was so i could put the bbc where the sbc goes .also really just widen it for the ablity to take the valve covers off and more access to the back of the engine. was able to use headers for 67-72 bbc hooker. hope this helped.p.s.first firewall was not to pretty so redid it second one is the way to go .use 16 ga, cold rolled. i.e painted one

[azdude1964]

also aloud me to run dual fans and a serp drive system.

[66-PMD-GMC]

Originally Posted by azdude1964

The reason was so i could put the bbc where the sbc goes .also really just widen it for the ablity to take the valve covers off and more access to the back of the engine. was able to use headers for 67-72 bbc hooker. hope this helped.p.s.first firewall was not to pretty so redid it second one is the way to go .use 16 ga, cold rolled. i.e painted one

Originally Posted by azdude1964

also aloud me to run dual fans and a serp drive system.

OK,
I have the motor mount frame brackets from a 72 GMC that was originally a big block truck.
The brackets and cross member are being used in a 65 build.
(I am also using the 72 frame)
The brackets are different than small block brackets I have here as I compared them side by side.
They allow the motor to sit lower and back.
I had it all mocked up and didn't notice any clearance issues before taking it apart again.
I will check clearance again once I get the cab back on the frame but I really like how your firewall came out so if things are too tight I may just copy your design.

[azdude1964]

yeah that will help . but the 67-72 firewall is a little different. if you decide to copy mine i will give you all the measurements and such.

[chad64chevy]

truck looks awesome, got any pics of the bars behind the seats? i was thinking of putting 4 point harness in mine and think i need to add the bar so they can attach to it!!

[66-PMD-GMC]

Originally Posted by azdude1964

yeah that will help . but the 67-72 firewall is a little different. if you decide to copy mine i will give you all the measurements and such.

I just want to make sure the wiper motor and heater parts still fit when all is said and done.
I am using the 63 recirculation system.

[azdude1964]

wiper motor is on effected do to the 45deg. bend. as for the ductwork you might need to mod it a little. depending on what system your using.

[azdude1964]

Chad, the bar you see is part of the seat frame i built. i need to send it back to the powercoater , will send you a pic.

[66-PMD-GMC]

Originally Posted by azdude1964

wiper motor is on effected do to the 45deg. bend. as for the ductwork you might need to mod it a little. depending on what system your using.

OK, Thanks

[azdude1964]

here is the seat frame i made ,it bolts to the factory location and is setup for a five point harness.

[chad64chevy]

dude that looks great, nice welds too!! thanks for posting the pics!