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HI guys i have a m715 that i put a 455 Buick motor in i built the engine up to around 500 HP and it works great except the stock radiator isnt enough to keep it cool do you know what rad wuold work with out cutting or modifing the body ??? also has anybody put two &half ton rockwells in their m715 any help would be great THANKS
hey 455, I'm planning on getting a new radiator as well. spicer has changed his to a summit racing radiator. I looked at their site and found one for $170 don't know if its the right one for sure.
The part # is sum-380325
Spicer is this the same one you used?
thanks i saw alum radiators in sumit catalog not sure if they would fit or not or be big enough ?
Look the some of the pics on http://www.m715.com specifically Rogers truck...rockwells under that one...at leat 4 or 5 I know of have done it.
brute4c
The Summit radiator is big enough, I'm going to use the big GM deal. If it's good enough for 454's, one more cube should be fine. You'll have to fiddle w/it but shouldn't be hard if you managed to get the 455 in there!
How is that 455? I've got one sitting in the garage for the 725, curious how it does... any issues that would be good to know about beforehand??? Mine's going to be kept mostly stock.
I really like the 455 there a little expensive to build but you end up with great power i wrote it wrong the first time its 450 HP/550torque its an easy swap because late 60 jeeps used buick motors so you find one and you have all the parts to do the swap i used rears and trans from a 75 J20 and bell housing from a 68 not a bad swap to do but i keep breaking axles in the front 44 anysugestions THANKS
A stock replacement radiator for a 350 buick powered j-10 should be a bolt in
455,
Mind if I ask who built your motor and what mods you did? I've got a 455 I need to rebuild.
no i dont mind I built the 455 myself i had a local machine shop do the heads/bore it out 30 thou they also shaved the heads and did cam bearings i put a big cam in it from TA performance heavier valve springs and reworked the oil passages but if yours is 71 or newer you should be ok with the oil system mine was a 1970 and they only had a half inch oil passage newer ones have 5 eights TA was a great help with tech questions and figuring out what cam to run and other upgrades although there hard to find you can get your pistons/rings and most other parts at regular auto parts stores for alot less money i would like to get a set of headers but i know they wouldnt fit anything else let me know
455,
Mine's a '70 as well. Which cam did you go with? Happy with it? I've been browsing thru some of TA's and Poston's choices. I don't want anything crazy, just give it a little more umph. I think I'd rather pick up more torque than hp.
I've got to have mine bored and get a good valve job done. What did your compression end up being? I'd like to be able to run on 87 pump gas. Did you do any porting? Did you keep the 750 cfm Qjet or go with something else? I think I'm going to try and find the later 800 cfm model.
Thanks
Will this summit radiator fit a stock rad support?
Thanks.
Mikel
BEACHTRUCK iused the TA C113 cam thats the one they recomended for what i was using it for i take the 715 to truck pulls during the summer and i do have a problem. TA told me that cam was good torque producer from 1500 hund to 7000 RPM but it doesnt turn on until about 2400 and when it dose you better be holding on because it really opens up. the truck will idle at 1100 RPM and i run premium gas with octane boster . i still drive it on the road all the time to work and to haul things and i also plow snow with it and its a nice moter to drive u can drive it just like u would a regular motor .as for the comp i got these numbers from TA after ther had me check the ccs on the heads and cylinders 10to1 no i didnt do any porting and i up graded to the 800cfm if yours is a 70 make sure u enlarge the oil passages and get a bigger pick up ttube i also recomend the groved cam bearings from TA TA1559
455,
Hey, thanks for the help. I'll probably end up with a similar build.
I just ordered the summit radiator, will let you all know if it fits.
I'm not sure what model # mine radiator was. Aluminum w/side tanks. I had to cut and move the passenger side radiator support over about 3/8" and make up specific mounts for it. Does pretty good on my 427TD BBC, though I'm probably half the HP your claiming.
THANKS for all your help on the radiator questions..
I'm trying a Lincoln Mark VIII electric fan on the stock radiator, for the 472. Its a cheap way out, if it works. $50 bucks at the salvage yard. Big cfm's like 4500 or something. Will be awhile before she's on the road to post results though. I can say it covers all but about a half in. on both sides, and covers just the top tank.