I didn't reinforce the frame. 67-72's also came with inline 6cyl's. The inline 6 weighs within 75lb of the 4bt. My mounts are made of 3/8" X2.5" bar stock. I have 1.75"X.25" bar stock diagonal reinforcments. It is welded thick, ugly and strong. If you intend to do high speed off roading. rock crawling or other activities such as this the frame might need to be reinforced. I did my welding with a battery powered ready-welder spool gun. My steel cutting was done with a abrasive blade I put on my chopsaw and my sawzall with a lot of "free sample" lennox bi-metal blades. Yes you can cut 3/8" steel with a sawzall(earplugs, oil, box of new blades, and patience). The rubber bread truck mounts are supposedly fluid mounts. Remember they will compress about 30-50% when the weight of the motor is on them. You can move the engine up and down about 6" between the oil pan hitting the front diff and the tranny hitting the tunnel. The bottom of my rubber motor mount sits on a 3/8" plate which is 1/2" lower than the bottom of the frame rail. My most time consuming issue beleive it or not was trying to peice together water hoses and pipe for the radiator. I had the intake and airfilter from the bread truck. I had the complete exhaust from the bread truck. I bought a 8ft peice of 3" flex pipe to complete the exhaust. Exhaust turns out right in front of the right rear tire. My fuel return line T's back into the regular fuel line back near the tank. Before you bolt the motor in bash the firewall in a bit with a big hammer to help clear the downpipe. You can probably get the rest of the clearance by cutting the straightpipe between the turbo and the elbow. If you still can't get enough room you can cut and reweld it sharper than 90 to make the turn quicker but this will hinder flow.
)
