megavites
Well-Known Member
looking at TTI headers for my 75 318 with 70 heads.
TTi says 4wks for small port 318 head at 1.09w x 1.55h.
Larger 318/340/360 exhaust port is 1.30w x 1.80h.
I wasn't aware of the different sizes. Can't wait 4wks.
Thinking about Dougs d453's...they don't list any difference in the exhaust port size.
I measured and get smaller numbers than 1.09 x 1.55.
I find no reference online on exhaust port size on OEM heads.
TTi says 4wks for small port 318 head at 1.09w x 1.55h.
Larger 318/340/360 exhaust port is 1.30w x 1.80h.
I wasn't aware of the different sizes. Can't wait 4wks.
Thinking about Dougs d453's...they don't list any difference in the exhaust port size.
I measured and get smaller numbers than 1.09 x 1.55.
I find no reference online on exhaust port size on OEM heads.