Head gaskets...... Not really a good place to scrimp IMO.
I'd stick with the 4.410 Cometics.
What you're experiencing is why I prefer not to try and make a head into something it's not by excessively porting it.
If you need a bigger head....... And something is available.......its often less expensive in the long run to just get them at the start.
thanks Dwayne ,
the source heads were what I could afford at the time and met my needs . They did run 6 plus years .
These Tf heads are costing me $3800 plus any 10% tax , so down here we do have to budget some items
with the bigger motor well I can now afford a better cyl head . I am not a number chaser , just a street driving bracket racer .
Are you of the opinion the fel1009 are just not good enough ? They list as same bore size and thickness
Tex
