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I know where there is a TH-350 for free, but it needs a short tail shaft and tail shaft housing (came out of a 4wd)
2.02" Intakes. I was just looking at the numbers one was made december 5 1965 & the other was made december 6 1965. pretty sure these are the 461 heads. looks like if i want the L79 power i am going to have to up the compression a tad. My book calls for 11-1 461's are good flowing heads.
No more than you're doing with it, a 3 angle will suffice. And don't go overboard porting. You can do more harm than good. .This is probably going to be a slow build so i may take the time to do a port & polish job and if i can talk the machine shop into it a 5 angle valve job.