Hello everyone, I am new here and more or less a new mustang owner from west texas. About two years ago I bought my first fox, it is a 1984 GT 350 (or at least thats what it says on side of car ). It had a 302 with edlebrock lower intake, holley 4 bbl carb, long tube headers (unknown maker), MSD 6al (or something) ignition system, flowmaster H pipe. And maybe a camshaft, it sounds real throaty like I dunno deep and gurguling unless that is just the long tube H pipe c0mbo doing it. and the rear end tag says something like 2.89 or 2.98 something close to that been a while since i looked at it. Car Really was not that fast I mean a stock new charger and me were neck and neck. so I had a small issue with car after i started to fix various things leaks and gaskets things of that nature I started to notice a hissing sound and white smoke in valve covers. a coworker came over put a presure guage to my pistons and found one was not holding pressure. He told me it was piston rings and then a little later after buying my first home with a shop in back and basic tools and a engine puller and what not, I have took my engine out and apart to have discovered some debri in valves that wasn't letting it seal nice (you live you learn). and decided im just going to put a larger motor in and forget about it. so for some time now I have studied on it. And have came to realize this is some complex stuff the more I learn the more I realize I don't know what i'm doing. I have bought a used 351w from a car yard it is out of a 89 f-150 I have torn it apart and am about to be recieving a tax refund that I will be using to get this motor turned into something that will run. I will have $2000 to get it going PLUS whatever I get From selling off the parts I no longer will need from the 302 on ebay, Or any of you that may need them. So im looking for advice on what can and cant be put togeather. I have been going back and forth between keeping it 351 or bumping it up using the 302 pistons and a new crank to get more displacement. What im worried about is putting it togeather with a higher compression then what it had. but not knowing what combinations will work to get it with out my pistons hitting the valves and clearance issues of that nature. If just putting these 60cc heads on would get me into a nice compression then thats all I will do looking for like 10 to 10.5-1, along with rebuilding the motor getting swap kit and all the pieces and do dads (already got that part figgured out). but how do you know if they will clear your pistons with out striking the valves? stock dished pistons or the 302 pistons with a 3.85in crank. Sorry about the life story just wanted to give you some backround on this project thanks for any and all help and will post picture of this build as I go. Again if you need anything from my 302 motor that I will not be needing your more then welcome to buy it. such as lower intake headers for aod and what not. Thanks.