Quote Originally Posted by Bowtie-r-die View Post
i was told here in shreveport by a ls1 modder(he said he has done 20-30 transplants) to use the 317 heads and get them shaved port them and spring em,drop a cam and yer all good,says the flow great
If you are going to shave them, look for 243 or 799 heads. Same port and runner, smaller chamber cc. 243's are getting real common 2007+ LH6's and LMG's came with them or 799's. 243's and 799's are virtually identical, they just come from different foundry's, hence the different casting #. The 799's are cast with a slightly finer grain sand, so they flow a smidge better stock (smoother runners), but if you are porting, there will be no difference.