I was going to post this in the monthly Banger Thread, but I didn’t want to muck it up with a bunch of pics and dumb questions. I have a relatively stock 29 Model A engine. I think it has been rebuilt at some time as it is bored .080” over and the cylinder walls look amazing, with no ridges. Here it is. I have converted to 12 volts, installed an FSI electronic dizzy with centrifugal advance, Champion plugs and a Marvel carb. Runs great… but of course I’d like s’more get up. So here goes… I recently acquired these two heads and have some questions about them. 1st – I can’t find much info on this one. The combustion chamber design looks stock to me. Would it provide any gains over the stock head? Do you know anything about this design? If it is better than stock, what head gasket would be best? 2nd – This one, I have found some info about it and it may be a decent performer. It does have a crack BUT, it’s between two water jacket holes. Would this be a problem or no big deal? The date on the left reads 4-21-33 My biggest concern is that the previous owner milled it down to try to get rid of crack (???) and in doing so, leveled the combustion side. Here is a pic showing what the underside should look like Looking at the picture of my engine posted above, the pistons do not protrude past the top of the block. SO… Is this head a good candidate to install or should I hang it on the wall? If it’s good to go… What head gasket(s) should I use? Any idea of what the compression ratio would be? Would it require a more “built” engine than mine? Driving conservatively, is there a good chance I’d kill my mains, which are most likely babbit? Thanks for your time!!!