72-CLASSIC_RIDE Posted August 21, 2021 Share Posted August 21, 2021 I installed Dougs 313 Ceramic coated headers in my 1972 402/400 with no interference. Proportional Valve close on driver side but still clearance. Used existing 350 Motor Mounts I think. My biggest problem would be getting to that header flange bolt passenger side firewall end as the A/C Box creates a problem accessing that bolt. Doug Quote Link to comment Share on other sites More sharing options...
70 turquoise Posted August 25, 2021 Share Posted August 25, 2021 Wow. I think I will send this passenger side header back to Dougs to get checked on the jig. They tell me I have to put motor mount stands in from classic industry. However I believe it will actually make the problem worse. Lifting the motor up is not the not the solution here. I will post some pics , doug thanks for the response very much helps me with my decision. Quote Link to comment Share on other sites More sharing options...
70 turquoise Posted August 25, 2021 Share Posted August 25, 2021 1 hour ago, 70 turquoise said: Wow. I think I will send this passenger side header back to Dougs to get checked on the jig. They tell me I have to put motor mount stands in from classic industry. However I believe it will actually make the problem worse. Lifting the motor up is not the not the solution here. I will post some pics , doug thanks for the response very much helps me with my decision. Quote Link to comment Share on other sites More sharing options...
snomobeelr Posted August 25, 2021 Share Posted August 25, 2021 I had the same issue with the dougs on the passenger side bb with th-400. Im gonna go with the ARH over the winter. I have the Patriot headers on they fit ok, but they hang too low.. . Quote Link to comment Share on other sites More sharing options...
72-CLASSIC_RIDE Posted August 26, 2021 Share Posted August 26, 2021 1 hour ago, snomobeelr said: I had the same issue with the dougs on the passenger side bb with th-400. Im gonna go with the ARH over the winter. I have the Patriot headers on they fit ok, but they hang too low.. . This was back in 2010 if I remember correctly that I installed them. I had the room also on passenger side to install a heat shield around Starter. Wonder if something had changed with the design............... Doug Quote Link to comment Share on other sites More sharing options...
70 turquoise Posted August 26, 2021 Share Posted August 26, 2021 Ya not crazy about the starter being so close. I was going to wrap the headers. And put a shield in. But it’s the Lower a-frame rear mount that is the biggest problem. If you see the rear shot of the trans you see I’m a good inch from putting the bolts in trans mount. I could cut the a-arm mount and weld a triangle brace in from the frame and retain strength. But damn I shouldn’t have to do that. Doug how far away are you from that a-frame hanger. And thank both you guys for chiming in. I’m in a pickle here. Greg 210-213-2323 Quote Link to comment Share on other sites More sharing options...
70 turquoise Posted August 26, 2021 Share Posted August 26, 2021 And I bought the stands from classic. Got them today. Waste of money. Quote Link to comment Share on other sites More sharing options...
70 turquoise Posted August 26, 2021 Share Posted August 26, 2021 And yes Doug that rear bolt on passenger side is a pain. But my front clip is off so it was easy with a long quarter inch extension Quote Link to comment Share on other sites More sharing options...
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