1st ? is the firing order the same as a small block?
2nd ? this is a old pontiac 350 not a chevy i noticed that the distributer is clocked slightly ie coil tower points slightly at pass headlights.
my nieghbor is having trouble with backfire after plug change
silly guy removed all wires at the same time w/out knowing the fireing order or where #1 is on the distributer
if the firing order is the same as a small block could anyone explain where #1 tower is so this guy quits bothering me

 

1st. The smallest "big block" Chevy engine was the 366T, not a 350;

2nd. All Pontiac V-8 cases are the same dimensions - no "big" or "small" blocks;

3rd. The firing order is tha same as either flavor of Chevy engine - 1-8-4-3-6-5-7-2

 

ya there isn't a big block 350, and did he gap the plugs right? I've seen that happen and the car doesn't run right.

 

Yes, the firing order is the same, but instead of wiring it as if it were clockwise, the rotor will turn counter clockwise. I found this out the hard way on a 71 LeMans with a 400 Pontiac. Plus, if he can't figure out where #1 is, he has to pull the distrubutor out, make sure he's at TDC, stab the pump, drop the distributor back in, and wire it. He has to keep in mind that Pontiacs like a ton of advance, atleast 12 to 14 degrees, so grab the timing light and have some fun. Hope this helps, and hopefully he learned his lesson.

 

this can be argued but the 350 pontiac can technically be called a big block along with the 326-455 as they are all the same same and the 265-301 the small block pontiacs, but the fireing order is the same for chevy and pontiac but the distributour spins counter clockwise on a pontiac and clockwise on a chevy

 

thanks for the answers guys!
how did i know i would get the right answers here

tempest i agree w/ you. the intake manifold on this engine is a lot wider than any "smallblock" i have ever seen

 

Wouldn't the 348 be considered a big block Chevy?

 

I think that the 348 and 409 are in a class of their own, along with the rare, old design 427. The term "big block" has usually been associated with the Mk IV engines (now Mk V and VI).

 

The 348 and 409 blocks are considered Tall Blocks, they don't even interchange with any of the Mark IV, V, or IV blocks.

As for the Pontiac big block, they are all the same, the only difference is the crank stroke and bore, the blocks are the same, so there isn't a difference between small or big blocks like the other manufacturers. They are a weird breed, but make some serious torque.

 

The "big block" designation on Pontiac engines comes from its outer dimensions being around that of the big block chevy engines. And the old Ponchos made some serious power to back up those measurements.

~M~

 

I know that. Back in the day the 348,409 and race version 427 were considered big blocks.