340 Piston to valve clearance w/RHS heads

That extra weight is at the very end, it does add up. Speed pro pistons are heavy, yeah their web page might say no biggie, they want you to buy their stuff, lol

U forgot the engine might smoke the first few mins with the forged pistons. I'm old enough to recall when many fast cars on the street all smoked at wot, lol The 1970 cars were 10-12 years old, it was great for $500 U could get a real car and beat on it--till the fame cracked , ha ha. Winter driving when streets were dry were a blast, U missed so much...

I got this feeling those trw/speed pros are now made in China, my KB hypers were made in Mexico, does it matter, IDK

I do know my engine builder was all for hypers if no nitrous was being used. He said thou some people just can't get it in to their heads hypers are better all around. They will not break and no need for "too much timing".

That and loose bearing clearances, like .0025 min, looser is "better". Too tight they heat up and spin but some folks just think .001 is the way to go

That engine shop is in Westland, he-Doug--is really in to Mopars, he isn't no kid either and not some old fart. They built my engine just fine and didn't sell me stuff like decking cause it didn't need it. If U got some time stop on up there and chat with him, he will remember me and my car. Won't hurt to speak with him before U pull the trigger. Its Am Car on Hix rd, cool guys, cool shop. I put 2,500 miles on that engine since July and long trips where just east i-75 and to westland. The rest was stop and go traffic driving and short blasts down the freeways. Its just fine, good oil pressures also 30 lbs min when hot. I could had spent more but got little extra. Its coming out mid March, rain, snow or sun