Looks like a great place here find a lot of good info I have an early 348 L/13/57 not drilled for spark plug coolers I had it all redone had to bore 90 over because of pitting in #1 cylinder head gasket went now I would like to get some performance from it what are some good aluminum heads and a cam to give a lope in idle if possible I don’t know how much tolerance is there Thanks for any help
New here hi everyone
- Thread starter Schack348
- Start date
Welcome aboard!
@Don Jacks will chime in with great advice on your build.
Does the block have the pads for the cooling holes. If not you’ll need to plug those wholes in the heads of your choice. Be it aluminum or a cast iron head not made for non cooling block.
Muphdog thanks my block is the early1872 I’m assuming with no holes for spark plug coolers it has the 2791 heads also suggesting that I heard I will have to plug holes on heads when changing them I went threw this motor years ago and it’s basically stock other then being bored out 90 over because of a bad head gasket and sitting
Don Jacks it’s been quite a while since I went threw the motor they are I think at least 10.5 I remember motor was bored 90 over because of a bad head gasket, Bob Walla Racing for your heads.What piston are you using?I need to know that to help with cam selection.
Scott and you drill 1872 block without pads I don’t think so but just asking
No if pads aren't there, there is a drop down from deck surface. Yes drill and tap holes in heads for a threaded plug if it's not flush when installed have them milled just enough to get flat. I don't have picture of the difference in blocks(early to late) but I'm sure there's one on this site somewhere or someone has a pic they can post.
That makes two of us, I'm not one of the smart guys. Depending on the pistons used will have to watch lift and duration. Don Jacks can set you straight on that. Just need to know for sure what pistons you have. I think most times guys stay in the 230-240 duration range at .050 lift. but like I said Don or someone can set you on the right path for certain.
