TBI Spark Plugs

[custodian]

I'm putting a set of TBI heads on my 75 350 that I'm building. they have the 1.94/1,50 valves and 65cc chambers, casting #14102193 and used on a 87 up 350.

Now my question: What spark plugs are used in the TBI heads?

 

[RecklessWOT]

my 1987 TBI uses ACDelco CR43TS


Are you planning on running TBI though? Just curious why you would choose those heads if you're still running a carb. They weren't exactly great heads in any aspect

 

[custodian]

my 1987 TBI uses ACDelco CR43TS


Are you planning on running TBI though? Just curious why you would choose those heads if you're still running a carb. They weren't exactly great heads in any aspect

Running a carb. Replacing a 6.2 diesel with my 75 350 with TBI heads. This is a standard build 350 for my youngest granddaughter who is 15 at the time.

 

[Catbox]

my 1987 TBI uses ACDelco CR43TS


Are you planning on running TBI though? Just curious why you would choose those heads if you're still running a carb. They weren't exactly great heads in any aspect

I saw one of the magazines call these heads the worst flowing heads GM has mass produced.
My Suburban wears a set and we have terrible mileage and the engine is totally done at 4,000rpm.
Perfect for a kids truck.

 

[Bextreme04]

Don’t the TBI heads have a different intake bolt pattern too? Middle two bolts on each side are at a different angle than the carb heads, right?

 

[custodian]

Don’t the TBI heads have a different intake bolt pattern too? Middle two bolts on each side are at a different angle than the carb heads, right?

Yes, different intake bolt pattern in the middle. I have the intake. The motor I'm building came with these heads and the intake, just using what I have. Not building a power house.

 

[RecklessWOT]

Yes, different intake bolt pattern in the middle. I have the intake. The motor I'm building came with these heads and the intake, just using what I have. Not building a power house.

 

[jake wells]

NGK V-Power Nickel 2771 is what i recommend they are much better quality than the chinese made delco plugs.