1973 challenger big block conversion questions?

[classicone64]

hello! i am new to the site and live in indiana and i have a 73 challenger. i am putting in a 400 big block and over the fall and winter i am stroking another 400 to a 451. i was wandering if i have to change the k member to make it fit or will the engine work with the one in the car? it was a 340 but it was long gone when i got the car. the engine and trans is fresh. the trans is a 727 and we pulled them as one last week from a 73 charger. i seen the tread on big block swaps but didnt see anything about the k member. i was told from someone else that it had to be changed? any help would be great! thanks

[Perry]

Welcome, I am new here to so maybe this will be my first chance to help someone out. You will not need to change out your k-frame. You will be fine as long as it is a V8 K-frame. Iswapped a 440 in place of the old 318 and it bolted right up.

Perry

P.S. oh yeah, better post some pics of your car before you get the business.

[classicone64]

thanks! i was thinking it would be ok. i will post pics tomorrow. i am getting ready to take it apart and repaint it. going sublime and black. i already put on the wheels. they are ridler 695 18 front 20 rears. black center but the wheels have a big outer lip i painted green to accent the body. it going to look nice once i get the whole car repainted and done!

[torqueaddict]

Im not as seasoned as some of the othe members but welcome friend, you just have to change the motor mounts thats it really. once you do that it will drop right in. If you had a small block 727 you dont even have to change your drive shaft if you use a big block 727. Enjoy friend!

[Chryco Psycho]

There are a few other things to change , you will need a larger rad unless you have the 26" wide heavy cooling pkg or A/C even then the bottom connection will be on the wrong side unless you use the 73 up water pump housing on the big block .& would recommend bigger T bars . Wiring harness will need to be extended or swapped .  Power steering & alt brackets needs to be for the big block & do not interchange with small block

[classicone64]

as far as i know i think i got all i need to put it in. i have been tryin to post pics but it says there to big now i need to figure out how to make them smaller.

[Perry]

If you read the 'Welcome' sticky at the top it tells how to resize. THere are threads on here as well.

Perry

[classicone64]

sorry to be a pain in the butt,,, i cant find were it says  TOOLS in the main page? im still tryin down size and load pics.