Liquid_02

I am positive they won't work. I've tried on a t-bird 5.0 engine changing it to an H.O. You have to notch or replace the pistons.

Also just because they have a "6 second mustang" doesn't mean they know squat about the 302's, if they have a 6 second car it's not with THE (as in ford 302) 302, or any ford motor for that matter. And they don't have a 6 second car I can 100% guerantee that, assuming it's a pro-stock car, because I know the guy who held the record for awhile in that class, ran something like 8.2x or something, he owns a performance shop here, my dad used to be in buisness with him.

pitman86gt

86's are light. seen several with same setup as me on drag radials run high 12's. guy that is building my motors brother went 12.7's with around what i got. not quite as much though, but that is not the question here. the question is what to do with heads.

pitman86gt

i am telling u they work. i had them on. been on there since 98
with 1.7's. i think it is motor to motor from what mechanic told me. not all engines and heads are the same deck height. and i dont know if i said it before, but the pistons are cut do to the old valves hitting the piston.

Liquid_02

It's not motor to motor :\ if it was motor to motor the difference would be so slight it would be un-noticeable, like 0.001" - 0.005" ish, it's not motor to motor. I wouldn't take it back to that mechanic, because I can tell you right now he's a dumbass if he thinks the valves notched it themselves. The valves are bent right, so they may be "notched" where your valves were bent to, now, when you you straight valves in there they're going to be longer, right? And the "notched" area is now not where the new valves sit. So your pistons are going to slam right back into them and you're going to have to go through all this all over again. Besides, the burr on the pistons are going to creat a hot-spot, and you're going to burn it out.

pitman86gt

i was not saying they were notched perfect, i was saying that they were some what notched, sorry for the missunderstanding. and i will tell u this much he is no dumbass being him and his family have a buisness building dirt track cars and drag cars. and as for the 6 second car, i dont care what engine u have. if u build a car that fast you may have a little understanding in how engines work, dont u think so. here is what he wants to do, get rid of the 1.7's go with 1.6s and check clearance and then cut relief if needed. here is the only problem. he said that he is scared that the piston tops may not be thick enough to make the clearance. dont quote me, but i beleive that he said that the notch right now is at .040 deep or near that. do u know the thickness of the piston top.

Liquid_02

I don't know the thickness of the top, but you know what? What do you honestly have to lose? Grind them down as far as necessary and see if you can make clearance, if you go through, you need pistons, not the end of the world. If you dont at least try, you'll need e6 heads. There should be plenty to notch them though, I had plenty.

pitman86gt

ok thx bro and no hard feelings about the piston notching and ****. i just want to figure it out. but i know that 1.6's will give me some more room. also if u know anyone wanting to trade 1.6's for 1.7 crane cam roller rockers let me know. they are pedastal mount. and do u have a 86 with flat tops

Liquid_02

I'll trade you my 1.6's for 1.7's aha I don't have one, my bud does though, 86 T-Bird 5.0 which we converted to an H.O.

pitman86gt

how old are they and what kind. also what about shipping.

Liquid_02

They're factory, off a 92 with 120,000kms (75,000 miles-ish?) Don't know if that's what you're looking for or not